{"id":17682,"date":"2024-11-30T06:36:41","date_gmt":"2024-11-30T06:36:41","guid":{"rendered":"https:\/\/aludiecasting.com\/?p=17682"},"modified":"2024-11-30T06:37:28","modified_gmt":"2024-11-30T06:37:28","slug":"15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81","status":"publish","type":"post","link":"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/","title":{"rendered":"15 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03b3\u03b9\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03c5\u03bb\u03b9\u03ba\u03cc \u03ba\u03b1\u03b9 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1"},"content":{"rendered":"<p>\u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03ac \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03c0\u03bf\u03c5 \u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03bc\u03b7\u03c7\u03b1\u03bd\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03bf\u03c0\u03ce\u03bd. \u03a5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03b4\u03b5\u03ba\u03b1\u03c0\u03ad\u03bd\u03c4\u03b5 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd.  \u03a4\u03b1 \u03c3\u03c0\u03b5\u03b9\u03c1\u03bf\u03b5\u03b9\u03b4\u03ae \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03b3\u03b5\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b3\u03b5\u03c9\u03c4\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2. \u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03bc\u03b5 \u03bc\u03cd\u03c4\u03b5\u03c2 Brad point \u03b5\u03bc\u03c0\u03bf\u03b4\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c3\u03c0\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03be\u03cd\u03bb\u03bf\u03c5. \u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 Forstner \u03b1\u03bd\u03bf\u03af\u03b3\u03bf\u03c5\u03bd \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2 \u03bc\u03b5 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03c0\u03c5\u03b8\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c4\u03bf \u03be\u03cd\u03bb\u03bf. \u03a4\u03b1 \u03c0\u03c1\u03b9\u03cc\u03bd\u03b9\u03b1 \u03bf\u03c0\u03ce\u03bd \u03b1\u03c6\u03b1\u03b9\u03c1\u03bf\u03cd\u03bd \u03bc\u03b5\u03b3\u03ac\u03bb\u03b1, \u03ba\u03c5\u03ba\u03bb\u03b9\u03ba\u03ac \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1. \u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2 \u03c0\u03c1\u03bf\u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c3\u03b5 \u03c3\u03ba\u03c5\u03c1\u03cc\u03b4\u03b5\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03cd\u03b2\u03bb\u03b1.<\/p>\n\n\n\n<p>\u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf, \u03c4\u03b9 \u03b5\u03af\u03b4\u03bf\u03c5\u03c2 \u03c5\u03bb\u03b9\u03ba\u03cc \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03b4\u03b5\u03bd \u03b8\u03b1 \u03c3\u03c0\u03ac\u03c3\u03b5\u03b9; \u0393\u03b9\u03b1 \u03b1\u03c5\u03c4\u03cc, \u03b5\u03c0\u03b9\u03bb\u03ad\u03be\u03c4\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c5\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03c5\u03c7\u03af\u03b1 \u03c4\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf\u03c5. \u0391\u03c5\u03c4\u03cc\u03c2 \u03bf \u03bf\u03b4\u03b7\u03b3\u03cc\u03c2 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03b1\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c4\u03c9\u03bd \u03c7\u03c1\u03ae\u03c3\u03b5\u03c9\u03bd, \u03c4\u03c9\u03bd \u03b5\u03c0\u03b9\u03ba\u03b1\u03bb\u03cd\u03c8\u03b5\u03c9\u03bd, \u03c4\u03c9\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03ce\u03c0\u03b9\u03c3\u03b7\u03c2 \u03c0\u03c1\u03bf\u03b2\u03bb\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u03a4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd - \u03be\u03cd\u03bb\u03bf, \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1, \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03bf\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/0tI94kclpII?feature=oembed\"  allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u03a0\u03af\u03bd\u03b1\u03ba\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u0395\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03a0\u03af\u03bd\u03b1\u03ba\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u0395\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7c7c7c;color:#7c7c7c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #7c7c7c;color:#7c7c7c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_Bit_Basics\" >\u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_Bit_Parts_and_Functions\" >\u039c\u03ad\u03c1\u03b7 \u03ba\u03b1\u03b9 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Shank_types\" >\u03a4\u03cd\u03c0\u03bf\u03b9 \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03bf\u03c5\u03c2<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#15_Types_of_Drill_Bits\" >15 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Common_Drill_Bits\" >\u039a\u03bf\u03b9\u03bd\u03ac \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#1_Twist_Drill_Bit\" >1.   Twist Drill Bit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#2_Brad-point_Drill_Bit\" >2.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 Brad-point<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#3_Spade_Drill_Bit\" >3.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03b5 \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#4_Step_Drill_Bit\" >4.   \u0392\u03ae\u03bc\u03b1 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#5_Forstner_drill_bit\" >5.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 Forstner<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Specialized_Drill_Bits\" >\u0395\u03be\u03b5\u03b9\u03b4\u03b9\u03ba\u03b5\u03c5\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#6_Masonry_Drill_Bit\" >6.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#7_Glass_Drill_Bit\" >7.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03c5\u03b1\u03bb\u03b9\u03bf\u03cd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#8_Rivet_Drill_Bit\" >8.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03b9\u03b1 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03b9\u03b1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#9_Tile_Drill_Bit\" >9.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03bb\u03b1\u03ba\u03b9\u03b4\u03af\u03c9\u03bd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#10_Corning_Drill_Bit\" >10.               Corning Drill Bit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Advanced_Drill_Bits\" >\u03a0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#11_Pocket_Hole_Drill_Bit\" >11.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03c1\u03cd\u03c0\u03b1\u03c2 \u03c4\u03c3\u03ad\u03c0\u03b7\u03c2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#12_Self-Feed_Drill_Bit\" >12.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b1\u03c5\u03c4\u03bf\u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#13_Annular_Cutter_Drill_Bit\" >13.               \u0394\u03b1\u03ba\u03c4\u03c5\u03bb\u03b9\u03bf\u03b5\u03b9\u03b4\u03ad\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#14_Plug_Cutter_Drill_Bit\" >14.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03b5 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03cc \u03b2\u03cd\u03c3\u03bc\u03b1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#15_Drill_Saw_Drill_Bit\" >15.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03c1\u03b9\u03cc\u03bd\u03b9 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Features_and_Coatings_of_Drill_Bits\" >\u03a7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ce\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_bit_Features\" >\u03a7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_Bit_Coatings\" >\u0395\u03c0\u03b9\u03ba\u03b1\u03bb\u03cd\u03c8\u03b5\u03b9\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Matching_Drill_Bits_to_Workpieces\" >\u0391\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03af\u03c7\u03b9\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03bc\u03b5 \u03c4\u03b1 \u03c4\u03b5\u03bc\u03ac\u03c7\u03b9\u03b1 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Material_Compatibility\" >\u03a3\u03c5\u03bc\u03b2\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ce\u03bd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Hole_Cleaning_Techniques\" >\u03a4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b8\u03b1\u03c1\u03b9\u03c3\u03bc\u03bf\u03cd \u03bf\u03c0\u03ce\u03bd<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Practical_Drill_Bit_Applications\" >\u03a0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_Bit_Sizes_and_Shapes\" >\u039c\u03b5\u03b3\u03ad\u03b8\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03c7\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Drill_Bit_Uses\" >\u03a7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#How_to_Change_Drill_Bits\" >\u03a0\u03ce\u03c2 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03ac\u03b6\u03b5\u03c4\u03b5 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Troubleshooting_and_Advanced_Knowledge\" >\u0391\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03ce\u03c0\u03b9\u03c3\u03b7 \u03c0\u03c1\u03bf\u03b2\u03bb\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b3\u03bd\u03ce\u03c3\u03b5\u03b9\u03c2<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Differential_Sticking\" >\u0394\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03cc \u03ba\u03bf\u03bb\u03bb\u03ac\u03b5\u03b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Overcoming_Challenges_with_Unfamiliar_Materials\" >\u039e\u03b5\u03c0\u03b5\u03c1\u03bd\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b9\u03c2 \u03c0\u03c1\u03bf\u03ba\u03bb\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5 \u03ac\u03b3\u03bd\u03c9\u03c3\u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#Conclusion\" >\u03a3\u03c5\u03bc\u03c0\u03ad\u03c1\u03b1\u03c3\u03bc\u03b1:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/aludiecasting.com\/el\/15-%cf%84%cf%8d%cf%80%ce%bf%ce%b9-%cf%84%cf%81%cf%85%cf%80%ce%b1%ce%bd%ce%b9%cf%8e%ce%bd-%ce%b3%ce%b9%ce%b1-%ce%ba%ce%ac%ce%b8%ce%b5-%cf%85%ce%bb%ce%b9%ce%ba%cf%8c-%ce%ba%ce%b1%ce%b9-%ce%b5%cf%81\/#FAQs\" >\u03a3\u03c5\u03c7\u03bd\u03ad\u03c2 \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_Bit_Basics\"><\/span>\u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_Bit_Parts_and_Functions\"><\/span><a><\/a>\u039c\u03ad\u03c1\u03b7 \u03ba\u03b1\u03b9 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/1-1024x1024.jpg\" alt=\"\u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\" class=\"wp-image-17683\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/1-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/1-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/1-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u039a\u03ac\u03b8\u03b5 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf \u03bc\u03b5 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03b5\u03be\u03b1\u03c1\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1. \u0395\u03af\u03bd\u03b1\u03b9 \u03b1\u03c5\u03c4\u03cc \u03c0\u03bf\u03c5 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03bf\u03c7\u03ae \u03c4\u03bf\u03c5\u03c2.<\/p>\n\n\n\n<p>\u03a4\u03bf \u03ac\u03ba\u03c1\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c4\u03bc\u03ae\u03bc\u03b1 \u03c0\u03c1\u03c9\u03c4\u03bf\u03b2\u03bf\u03c5\u03bb\u03af\u03b1\u03c2, \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf, \u03c3\u03c4\u03b7\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1, \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1 \u03ba\u03bf\u03c0\u03ae\u03c2. \u03a4\u03bf \u03c3\u03c4\u03ad\u03bb\u03b5\u03c7\u03bf\u03c2 \u03b4\u03b9\u03b1\u03c4\u03af\u03b8\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03c3\u03c7\u03ad\u03b4\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03c7\u03ae\u03bc\u03b1\u03c4\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03c3\u03c4\u03c1\u03bf\u03b3\u03b3\u03c5\u03bb\u03cc \u03ae \u03b5\u03be\u03b1\u03b3\u03c9\u03bd\u03b9\u03ba\u03cc. \u0395\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c0\u03bb\u03b5\u03c5\u03c1\u03ac \u03c4\u03bf\u03c5 \u03ac\u03ba\u03c1\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03ad\u03b5\u03c4\u03b5 \u03bc\u03b5 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9.<\/p>\n\n\n\n<p>\u039c\u03b9\u03bb\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c4\u03bc\u03ae\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c6\u03bb\u03ac\u03bf\u03c5\u03c4\u03bf\u03c5, \u03ad\u03c7\u03b5\u03b9 \u03b1\u03c5\u03bb\u03b1\u03ba\u03ce\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2. \u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03b4\u03b9\u03bf\u03c7\u03b5\u03c4\u03b5\u03cd\u03bf\u03c5\u03bd \u03c4\u03b1 \u03c3\u03c5\u03bd\u03c4\u03c1\u03af\u03bc\u03bc\u03b9\u03b1 \u03bc\u03b1\u03ba\u03c1\u03b9\u03ac \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03c9\u03bd \u03b4\u03b9\u03b5\u03c1\u03b3\u03b1\u03c3\u03b9\u03ce\u03bd, \u03b5\u03bd\u03ce \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03b5\u03b9 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03ac \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b4\u03bf\u03bc\u03b9\u03ba\u03ae \u03b1\u03ba\u03b5\u03c1\u03b1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Shank_types\"><\/span><a><\/a>\u03a4\u03cd\u03c0\u03bf\u03b9 \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03bf\u03c5\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/2d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"625\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/2d.jpg\" alt=\"\u03c4\u03cd\u03c0\u03bf\u03b9 \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03bf\u03c5\u03c2\" class=\"wp-image-17684\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/2d.jpg 625w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/2d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 625px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u039a\u03bf\u03b9\u03c4\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b1 \u03c3\u03c7\u03ad\u03b4\u03b9\u03ac \u03c4\u03bf\u03c5\u03c2, \u03ba\u03ac\u03b8\u03b5 \u03c3\u03c4\u03ad\u03bb\u03b5\u03c7\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf \u03b3\u03b9\u03b1 \u03bc\u03b9\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Drill_bit_shank\" target=\"_blank\" rel=\"noopener\">\u0395\u03be\u03ac\u03b3\u03c9\u03bd\u03bf \u03c3\u03c4\u03ad\u03bb\u03b5\u03c7\u03bf\u03c2<\/a> \u03c0\u03b9\u03ac\u03bd\u03b5\u03b9 \u03b5\u03c5\u03c1\u03b5\u03af\u03b1 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03bb\u03b1\u03b2\u03ae\u03c2 \u03b3\u03b9\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1. \u0391\u03bd\u03c4\u03af\u03b8\u03b5\u03c4\u03b1, \u03c4\u03b1 \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03b7 SDS (slotted drive system) \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03ba\u03b1\u03bb\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b3\u03b9\u03b1 \u03b2\u03b1\u03c1\u03b9\u03ad\u03c2 \u03b5\u03c0\u03b9\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rotary_hammer\" target=\"_blank\" rel=\"noopener\">\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03b9\u03ba\u03ac \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<\/a>.<\/p>\n\n\n\n<p>\u03a4\u03b1 \u03c3\u03c4\u03c1\u03bf\u03b3\u03b3\u03c5\u03bb\u03ac \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03c5\u03c1\u03b9\u03bf\u03bb\u03b5\u03ba\u03c4\u03b9\u03ba\u03ac \u03bf\u03b9 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03bf\u03b9 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03b3\u03b9\u03b1 \u03cc\u03c3\u03bf\u03c5\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bd \u03ba\u03b1\u03b8\u03bf\u03bb\u03b9\u03ba\u03ae \u03c3\u03c5\u03bc\u03b2\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1. \u0395\u03bd \u03c4\u03c9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd, \u03c4\u03b1 \u03b1\u03c5\u03bb\u03b1\u03ba\u03c9\u03c4\u03ac \u03c3\u03c4\u03b5\u03bb\u03ad\u03c7\u03b7 \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03bd\u03bf\u03c5\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03c1\u03bf\u03c0\u03ae\u03c2 \u03c3\u03c4\u03b1 \u03ba\u03c1\u03bf\u03c5\u03c3\u03c4\u03b9\u03ba\u03ac \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"15_Types_of_Drill_Bits\"><\/span><a><\/a>15 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c3\u03c5\u03c7\u03bd\u03ac \u03bc\u03bf\u03b9\u03ac\u03b6\u03bf\u03c5\u03bd \u03c0\u03b1\u03c1\u03cc\u03bc\u03bf\u03b9\u03b1, \u03b1\u03bb\u03bb\u03ac \u03c0\u03c1\u03bf\u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b5\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2. \u03a3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03c5\u03bd \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1, \u03b1\u03bd\u03b8\u03b5\u03ba\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b1\u03b3\u03b3\u03b5\u03bb\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc \u03ac\u03b3\u03b3\u03b9\u03b3\u03bc\u03b1 \u03c3\u03b5 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b5\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Drill_Bits\"><\/span><a><\/a>\u039a\u03bf\u03b9\u03bd\u03ac \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Twist_Drill_Bit\"><\/span><a><\/a>1.   Twist Drill Bit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n\n\n<p>\u039f \u03c4\u03cd\u03c0\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03bc\u03b5 \u03c3\u03c0\u03b5\u03b9\u03c1\u03bf\u03b5\u03b9\u03b4\u03ad\u03c2 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af \u03bc\u03b9\u03b1 \u03b3\u03b5\u03bd\u03b9\u03ba\u03ae \u03c0\u03c1\u03c9\u03c4\u03b1\u03c1\u03c7\u03b9\u03ba\u03ae \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1. \u039f\u03b9 \u03c3\u03c0\u03b5\u03b9\u03c1\u03bf\u03b5\u03b9\u03b4\u03b5\u03af\u03c2 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03bf\u03af \u03c4\u03bf\u03c5\u03c2 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bd \u03c4\u03b9\u03c2 \u03bf\u03c0\u03ad\u03c2 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03be\u03b1\u03bb\u03b5\u03af\u03c6\u03bf\u03c5\u03bd \u03c4\u03b1 \u03c3\u03c5\u03bd\u03c4\u03c1\u03af\u03bc\u03bc\u03b9\u03b1, \u03b1\u03c5\u03be\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2. \u039c\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c3\u03c0\u03b5\u03b9\u03c1\u03bf\u03b5\u03b9\u03b4\u03bf\u03cd\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03bf, \u03be\u03cd\u03bb\u03bf \u03ba\u03b1\u03b9 \u03c0\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03ac \u03c5\u03bb\u03b9\u03ba\u03ac \u03b3\u03b9\u03b1 \u03b1\u03c0\u03bb\u03ad\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Brad-point_Drill_Bit\"><\/span><a><\/a>2.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 Brad-point<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/3d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/3d-1024x1024.jpg\" alt=\"\u03bc\u03ad\u03c1\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd\" class=\"wp-image-17685\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/3d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/3d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/3d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u038c\u03c0\u03c9\u03c2 \u03c4\u03bf \u03cc\u03bd\u03bf\u03bc\u03ac \u03c4\u03bf\u03c5 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03bf\u03c0\u03c4\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03bf\u03bd \u03c3\u03ba\u03bf\u03c0\u03cc \u03c4\u03bf\u03c5, \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b4\u03b9\u03b1\u03b8\u03ad\u03c4\u03b5\u03b9 \u03b1\u03b9\u03c7\u03bc\u03b7\u03c1\u03cc \u03ba\u03b5\u03bd\u03c4\u03c1\u03b9\u03ba\u03cc \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b3\u03b9\u03b1 \u03b1\u03ba\u03c1\u03b9\u03b2\u03ae \u03c4\u03bf\u03c0\u03bf\u03b8\u03ad\u03c4\u03b7\u03c3\u03b7. \u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c4\u03b5 \u03c4\u03bf \u03b3\u03b9\u03b1 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2 \u03bc\u03b5 \u03c5\u03bb\u03b9\u03ba\u03ac \u03b1\u03c0\u03cc \u03be\u03cd\u03bb\u03bf. \u0395\u03b9\u03b4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1, \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b4\u03b5\u03bd \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03bf\u03c0\u03ad\u03c2 \u03bd\u03b1 \u03c3\u03c7\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03ba\u03ac\u03bd\u03b5\u03b9 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ad\u03c2, \u03ba\u03ac\u03c4\u03b9 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03af\u03b3\u03bf\u03c5\u03c1\u03b1 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03bd\u03c4\u03bf\u03c5\u03bb\u03ac\u03c0\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03bb\u03b5\u03c0\u03c4\u03bf\u03bc\u03b5\u03c1\u03b5\u03af\u03c2 \u03be\u03c5\u03bb\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Spade_Drill_Bit\"><\/span><a><\/a>3.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03b5 \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/4d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/4d-1024x1024.jpg\" alt=\"\u03c3\u03c4\u03ad\u03bb\u03b5\u03c7\u03bf\u03c2\" class=\"wp-image-17686\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/4d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/4d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/4d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9-\u03c6\u03c4\u03c5\u03ac\u03c1\u03b9 \u03ad\u03c7\u03b5\u03b9 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03c4\u03b5\u03af \u03c3\u03b5 \u03c3\u03c7\u03ae\u03bc\u03b1 \u03ba\u03bf\u03c5\u03c0\u03b9\u03bf\u03cd. \u0393\u03b5\u03bd\u03b9\u03ba\u03ac, \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03b1\u03c3\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bd \u03bc\u03b5\u03b3\u03ac\u03bb\u03b5\u03c2 \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2 \u03c3\u03c4\u03bf \u03be\u03cd\u03bb\u03bf. \u03a5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ae \u03ba\u03bf\u03c5\u03c6\u03c9\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c0\u03c1\u03cc\u03c7\u03b5\u03b9\u03c1\u03b7 \u03be\u03c5\u03bb\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03ae, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03c4\u03c1\u03c5\u03c0\u03ac\u03b5\u03b9 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b1 \u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Step_Drill_Bit\"><\/span><a><\/a>4.   \u0392\u03ae\u03bc\u03b1 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/5d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/5d-1024x1024.jpg\" alt=\"\u03c3\u03c0\u03b9\u03c1\u03bf\u03cd\u03bd\u03b9\u03b1\" class=\"wp-image-17687\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/5d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/5d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/5d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u0397 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03b8\u03bc\u03b9\u03b4\u03c9\u03c4\u03bf\u03cd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03b9 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ac \u03bc\u03b5\u03b3\u03ad\u03b8\u03b7 \u03bf\u03c0\u03ce\u03bd, \u03b1\u03ba\u03cc\u03bc\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03b5 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03ae \u03bb\u03b5\u03c0\u03c4\u03ac \u03c5\u03bb\u03b9\u03ba\u03ac \u03cc\u03c0\u03c9\u03c2 \u03c4\u03bf \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03bf \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c0\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc. \u03a7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03ac\u03be\u03b5\u03c4\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bb\u03cc\u03b3\u03c9 \u03c4\u03bf\u03c5 \u03ba\u03bb\u03b9\u03bc\u03b1\u03ba\u03c9\u03c4\u03bf\u03cd \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03bf\u03cd \u03c4\u03bf\u03c5, \u03bf \u03bf\u03c0\u03bf\u03af\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 go-to \u03b3\u03b9\u03b1 \u03bb\u03b1\u03bc\u03b1\u03c1\u03af\u03bd\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Forstner_drill_bit\"><\/span><a><\/a>5.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 Forstner<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/6d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/6d-1024x1024.jpg\" alt=\"\u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 foster\" class=\"wp-image-17688\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/6d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/6d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/6d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 forstner \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b5\u03af\u03b4\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03bf\u03bc\u03b1\u03bb\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03c9\u03bd \u03bf\u03c0\u03ce\u03bd. \u039f\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf\u03b9 \u03b5\u03c1\u03b3\u03ac\u03c4\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03bc\u03c0\u03b9\u03c4 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ac\u03b6\u03bf\u03c5\u03bd \u03ba\u03b1\u03b9 \u03c7\u03c9\u03bd\u03b5\u03cd\u03bf\u03c5\u03bd \u03ad\u03c0\u03b9\u03c0\u03bb\u03b1 \u03c3\u03b5 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03c6\u03b9\u03bd\u03b9\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03b1 \u03bb\u03cc\u03b3\u03c9 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03b1\u03c2 \u03c3\u03b5 \u03be\u03cd\u03bb\u03b9\u03bd\u03b5\u03c2 \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Specialized_Drill_Bits\"><\/span><a><\/a>\u0395\u03be\u03b5\u03b9\u03b4\u03b9\u03ba\u03b5\u03c5\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Masonry_Drill_Bit\"><\/span><a><\/a>6.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1024x1024.jpg\" alt=\"\u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2\" class=\"wp-image-17689\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2 \u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c3\u03c5\u03bd\u03b7\u03b8\u03b9\u03c3\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc \u03ba\u03b1\u03b9 \u03c5\u03c0\u03b5\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03bc\u03b5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03b9\u03ba\u03ac \u03ae <a href=\"https:\/\/en.wikipedia.org\/wiki\/Hammer_drill\" target=\"_blank\" rel=\"noopener\">\u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03bc\u03b5 \u03c3\u03c6\u03c5\u03c1\u03af.<\/a> \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9 \u03c3\u03c5\u03bd\u03b4\u03c5\u03ac\u03b6\u03b5\u03b9 <a href=\"https:\/\/ruwag.co.za\/blogs\/news\/everything-you-need-to-know-about-carbide-drill-bits#:~:text=Carbide%20bits%20are%20made%20of,tile%20and%20other%20tough%20materials.\" target=\"_blank\" rel=\"noopener\">\u03bc\u03cd\u03c4\u03b5\u03c2 \u03ba\u03b1\u03c1\u03b2\u03b9\u03b4\u03af\u03bf\u03c5 \u03b2\u03bf\u03bb\u03c6\u03c1\u03b1\u03bc\u03af\u03bf\u03c5<\/a> \u03bc\u03b5 \u03c7\u03b1\u03bb\u03cd\u03b2\u03b4\u03b9\u03bd\u03b7 \u03b4\u03bf\u03bc\u03ae \u03b3\u03b9\u03b1 \u03b1\u03c5\u03be\u03b7\u03bc\u03ad\u03bd\u03b7 \u03b1\u03bd\u03c4\u03bf\u03c7\u03ae. \u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03ad\u03c4\u03c3\u03b9 \u03b5\u03c5\u03c1\u03ad\u03c9\u03c2 \u03c3\u03b5 \u03c3\u03ba\u03bb\u03b7\u03c1\u03ac \u03c5\u03bb\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03c3\u03ba\u03c5\u03c1\u03cc\u03b4\u03b5\u03bc\u03b1, \u03c4\u03bf\u03cd\u03b2\u03bb\u03b1 \u03ba\u03b1\u03b9 \u03c0\u03ad\u03c4\u03c1\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Glass_Drill_Bit\"><\/span><a><\/a>7.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03c5\u03b1\u03bb\u03b9\u03bf\u03cd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1-1024x1024.jpg\" alt=\"\u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03c5\u03b1\u03bb\u03b9\u03bf\u03cd\" class=\"wp-image-17690\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/7d-1-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03b3\u03c5\u03ac\u03bb\u03b9\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03bf\u03bc\u03b1\u03bb\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03bb\u03b5\u03b3\u03c7\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03bb\u03cc\u03b3\u03c9 \u03c4\u03c9\u03bd <a href=\"https:\/\/www.mica.co.za\/all-about-drill-bits-and-more-part-3\/#:~:text=This%20spear%2Dshaped%20bit%20is,%2C%208mm%2C%2010mm%20and%2012mm.\" target=\"_blank\" rel=\"noopener\">\u03ac\u03ba\u03c1\u03b5\u03c2 \u03c3\u03b5 \u03c3\u03c7\u03ae\u03bc\u03b1 \u03bb\u03cc\u03b3\u03c7\u03b7\u03c2<\/a><a href=\"https:\/\/www.mica.co.za\/all-about-drill-bits-and-more-part-3\/#:~:text=This%20spear%2Dshaped%20bit%20is,%2C%208mm%2C%2010mm%20and%2012mm.\" target=\"_blank\" rel=\"noopener\">.<\/a> \u039a\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c3\u03b5 \u03b3\u03c5\u03ac\u03bb\u03b9\u03bd\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc, \u03b1\u03c5\u03c4\u03ac \u03c4\u03b1 \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b9\u03b4\u03b9\u03b1\u03af\u03c4\u03b5\u03c1\u03b1 \u03b1\u03bd\u03b8\u03b5\u03ba\u03c4\u03b9\u03ba\u03ac \u03c3\u03b5 \u03b5\u03c5\u03b1\u03af\u03c3\u03b8\u03b7\u03c4\u03b1 \u03ad\u03c1\u03b3\u03b1 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03ad\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c1\u03ac\u03b3\u03b9\u03c3\u03bc\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8_Rivet_Drill_Bit\"><\/span><a><\/a>8.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03b9\u03b1 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03b9\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/8d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/8d-1024x1024.jpg\" alt=\"\u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03b9\u03b1 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03b9\u03b1\" class=\"wp-image-17691\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/8d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/8d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/8d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b3\u03b9\u03b1 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ae \u03bf\u03c0\u03ce\u03bd \u03b3\u03b9\u03b1 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03b9\u03b1 \u03c3\u03b5 \u03bb\u03b5\u03c0\u03c4\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03bb\u03bb\u03b9\u03ba\u03ad\u03c2 \u03c0\u03bb\u03ac\u03ba\u03b5\u03c2 \u03ae \u03c6\u03cd\u03bb\u03bb\u03b1. \u0395\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b9\u03b4\u03b1\u03bd\u03b9\u03ba\u03ae \u03bb\u03cd\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03bf\u03c0\u03ce\u03bd \u03ba\u03b1\u03b8\u03b1\u03c1\u03ce\u03bd, \u03b5\u03b9\u03b4\u03b9\u03ba\u03ac \u03b3\u03b9\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c0\u03c1\u03b9\u03c4\u03c3\u03af\u03bd\u03c9\u03bc\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"9_Tile_Drill_Bit\"><\/span><a><\/a>9.   \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03bb\u03b1\u03ba\u03b9\u03b4\u03af\u03c9\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/9d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/9d-1024x1024.jpg\" alt=\"\u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03ba\u03b1\u03c1\u03b2\u03b9\u03b4\u03af\u03bf\u03c5\" class=\"wp-image-17692\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/9d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/9d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/9d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u0399\u03b4\u03b1\u03bd\u03b9\u03ba\u03ac \u03b3\u03b9\u03b1 \u03ba\u03b5\u03c1\u03b1\u03bc\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03c0\u03bf\u03c1\u03c3\u03b5\u03bb\u03ac\u03bd\u03b7, \u03c4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c0\u03bb\u03b1\u03ba\u03b9\u03b4\u03af\u03c9\u03bd \u03c0\u03b5\u03c1\u03b9\u03ad\u03c7\u03bf\u03c5\u03bd \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03ba\u03b1\u03c1\u03b2\u03b9\u03b4\u03af\u03bf\u03c5 \u03ae \u03b4\u03b9\u03b1\u03bc\u03b1\u03bd\u03c4\u03b9\u03bf\u03cd. \u0391\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03c9\u03c0\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c3\u03ba\u03bb\u03b7\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03c9\u03bd \u03c5\u03bb\u03b9\u03ba\u03ce\u03bd \u03bc\u03b5 \u03b5\u03ba\u03c0\u03bb\u03b7\u03ba\u03c4\u03b9\u03ba\u03cc \u03c4\u03c1\u03cc\u03c0\u03bf, \u03b1\u03c0\u03bf\u03bc\u03b1\u03ba\u03c1\u03cd\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03c0\u03bf\u03ba\u03cc\u03bb\u03bb\u03b7\u03c3\u03b7\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"10_Corning_Drill_Bit\"><\/span><a><\/a>10.               Corning Drill Bit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/10d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/10d-1024x1024.jpg\" alt=\"corning \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1\" class=\"wp-image-17693\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/10d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/10d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/10d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u039f\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b5\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2 \u03b2\u03b1\u03c1\u03ad\u03c9\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5 \u03b5\u03ba\u03c4\u03b5\u03bb\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 corning, \u03ad\u03c4\u03c3\u03b9 \u03ce\u03c3\u03c4\u03b5 \u03bf\u03b9 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03bf\u03af \u03bd\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03bd\u03b1 \u03b1\u03c6\u03b1\u03b9\u03c1\u03bf\u03cd\u03bd \u03c0\u03c5\u03c1\u03ae\u03bd\u03b5\u03c2 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c3\u03b5 \u03c3\u03ba\u03c5\u03c1\u03cc\u03b4\u03b5\u03bc\u03b1 \u03ae \u03c0\u03ad\u03c4\u03c1\u03b1. \u0397 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd corning \u03b5\u03af\u03bd\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c5\u03b4\u03c1\u03b1\u03c5\u03bb\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ad\u03c2 \u03b5\u03b3\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03b9\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advanced_Drill_Bits\"><\/span><a><\/a>\u03a0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Pocket_Hole_Drill_Bit\"><\/span><a><\/a>11.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03c1\u03cd\u03c0\u03b1\u03c2 \u03c4\u03c3\u03ad\u03c0\u03b7\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/11d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/11d-1024x1024.jpg\" alt=\"\u03c0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1\" class=\"wp-image-17694\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/11d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/11d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/11d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03c4\u03c3\u03ad\u03c0\u03b7\u03c2 \u03c4\u03b5\u03af\u03bd\u03bf\u03c5\u03bd \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2 \u03c3\u03c4\u03bf \u03be\u03cd\u03bb\u03bf. \u03a3\u03c7\u03b7\u03bc\u03b1\u03c4\u03af\u03b6\u03bf\u03c5\u03bd \u03bc\u03b9\u03b1 \u03c4\u03c3\u03ad\u03c0\u03b7 \u03b3\u03b9\u03b1 <a href=\"https:\/\/uk.rs-online.com\/web\/content\/discovery\/ideas-and-advice\/screwdriver-bit-sets-guide\" target=\"_blank\" rel=\"noopener\">\u03bc\u03c0\u03b9\u03c4\u03ac\u03ba\u03b9\u03b1 \u03ba\u03b1\u03c4\u03c3\u03b1\u03b2\u03b9\u03b4\u03b9\u03bf\u03cd<\/a> \u03c3\u03b5 \u03b3\u03c9\u03bd\u03af\u03b1 15 \u03bc\u03bf\u03b9\u03c1\u03ce\u03bd \u03ba\u03b1\u03b9 \u03ad\u03c7\u03bf\u03c5\u03bd \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03c4\u03b5\u03af \u03bc\u03b5 \u03bc\u03b9\u03ba\u03c1\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03cd\u03c1\u03b9\u03b5\u03c2 \u03bc\u03cd\u03c4\u03b5\u03c2. \u0391\u03c5\u03c4\u03cc \u03c0\u03c1\u03bf\u03c3\u03b4\u03af\u03b4\u03b5\u03b9 \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03c5\u03c0\u03bf\u03c3\u03c4\u03ae\u03c1\u03b9\u03be\u03b7 \u03c3\u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03bc\u03b9\u03b1\u03c2 \u03c4\u03c1\u03cd\u03c0\u03b1\u03c2 \u03bc\u03b5 \u03bc\u03b9\u03b1 \u03c4\u03c3\u03ad\u03c0\u03b7 \u03c0\u03bf\u03c5 \u03ba\u03c1\u03b1\u03c4\u03ac\u03b5\u03b9 \u03c4\u03bf \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03cc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Self-Feed_Drill_Bit\"><\/span><a><\/a>12.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b1\u03c5\u03c4\u03bf\u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/12d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/12d-1024x1024.jpg\" alt=\"\" class=\"wp-image-17695\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/12d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/12d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/12d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03bf \u03b1\u03c5\u03c4\u03bf\u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf\u03c5\u03c2 \u03c0\u03b9\u03bf \u03c3\u03c5\u03c7\u03bd\u03ac \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf\u03c5\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03b3\u03b9\u03b1 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b7 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c3\u03c4\u03bf \u03be\u03cd\u03bb\u03bf. \u0388\u03c4\u03c3\u03b9, \u03bf\u03b9 \u03b1\u03b9\u03c7\u03bc\u03b7\u03c1\u03ad\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b1\u03ba\u03bc\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03bf \u03b5\u03bd\u03c3\u03c9\u03bc\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03bf\u03c2 \u03ba\u03bf\u03c7\u03bb\u03af\u03b1\u03c2 \u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c3\u03af\u03b1\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bd \u03c3\u03c4\u03bf\u03c5\u03c2 \u03b5\u03c1\u03b3\u03ac\u03c4\u03b5\u03c2 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bd \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b5\u03c2 \u03bf\u03c0\u03ad\u03c2. \u0395\u03af\u03bd\u03b1\u03b9, \u03b5\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2, \u03b5\u03c5\u03ba\u03bf\u03bb\u03cc\u03c4\u03b5\u03c1\u03bf \u03bd\u03b1 \u03c4\u03c1\u03b1\u03b2\u03b7\u03c7\u03c4\u03b5\u03af \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc, \u03cc\u03c0\u03c9\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03c5\u03c7\u03bd\u03ac \u03c3\u03c4\u03b7\u03bd \u03ba\u03bf\u03c1\u03bd\u03af\u03b6\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03c5\u03b4\u03c1\u03b1\u03c5\u03bb\u03b9\u03ba\u03ad\u03c2 \u03b5\u03b3\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03b9\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_Annular_Cutter_Drill_Bit\"><\/span><a><\/a>13.               \u0394\u03b1\u03ba\u03c4\u03c5\u03bb\u03b9\u03bf\u03b5\u03b9\u03b4\u03ad\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/13d-1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/13d-1-1024x1024.jpg\" alt=\"\u03b4\u03b1\u03ba\u03c4\u03c5\u03bb\u03b9\u03bf\u03b5\u03b9\u03b4\u03ad\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03cc\" class=\"wp-image-17698\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/13d-1-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/13d-1-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/13d-1-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u039c\u03b1\u03b6\u03af \u03bc\u03b5 \u03c4\u03bf\u03bd \u03ba\u03bf\u03af\u03bb\u03bf \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc \u03c4\u03bf\u03c5, \u03b7 \u03b1\u03c6\u03b1\u03af\u03c1\u03b5\u03c3\u03b7 \u03bc\u03cc\u03bd\u03bf \u03c4\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03bc\u03b5\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03af \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03bf\u03cd \u03c4\u03bf\u03c5 \u03b4\u03b1\u03ba\u03c4\u03c5\u03bb\u03b9\u03bf\u03b5\u03b9\u03b4\u03bf\u03cd\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03bf\u03cd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b1\u03c0\u03bf\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03bf \u03b3\u03c1\u03ad\u03b6\u03b9 \u03ba\u03b1\u03b9 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03bf\u03bc\u03b1\u03bb\u03ad\u03c2 \u03bf\u03c0\u03ad\u03c2 \u03c3\u03c4\u03b1 \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03b1. \u03a4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03bc\u03b5 \u03b4\u03b1\u03ba\u03c4\u03c5\u03bb\u03b9\u03bf\u03b5\u03b9\u03b4\u03ae \u03ba\u03cc\u03c6\u03c4\u03b7 \u03ad\u03c7\u03bf\u03c5\u03bd \u03bc\u03b9\u03b1 \u03c0\u03bf\u03b9\u03ba\u03b9\u03bb\u03af\u03b1 \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03c3\u03b5\u03c9\u03bd. \u0391\u03c5\u03c4\u03cc \u03b1\u03c5\u03be\u03ac\u03bd\u03b5\u03b9 \u03cc\u03c3\u03bf \u03c4\u03bf \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03bd \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf \u03c4\u03b7\u03bd \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1 \u03c3\u03c4\u03b9\u03c2 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"14_Plug_Cutter_Drill_Bit\"><\/span><a><\/a>14.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03b5 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03cc \u03b2\u03cd\u03c3\u03bc\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/14d-1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/14d-1-1024x1024.jpg\" alt=\"\u03ba\u03cc\u03c6\u03c4\u03b7\u03c2 \u03b2\u03bf\u03c5\u03bb\u03c9\u03bc\u03ac\u03c4\u03c9\u03bd\" class=\"wp-image-17699\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/14d-1-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/14d-1-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/14d-1-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u0391\u03c5\u03c4\u03bf\u03af \u03bf\u03b9 \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03c0\u03b9\u03c4 \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03be\u03cd\u03bb\u03b9\u03bd\u03b1 \u03b2\u03cd\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03bf\u03c0\u03ad\u03c2 \u03c4\u03c9\u03bd \u03b2\u03b9\u03b4\u03ce\u03bd. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03ad\u03be\u03c5\u03c0\u03bd\u03bf \u03bc\u03c0\u03b9\u03c4 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03be\u03cd\u03bb\u03bf\u03c5, \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b5\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03b3\u03c5\u03b1\u03bb\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c6\u03b9\u03bd\u03af\u03c1\u03b9\u03c3\u03bc\u03b1 \u03b3\u03b9\u03b1 \u03ad\u03c0\u03b9\u03c0\u03bb\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03ac\u03c0\u03b5\u03b4\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"15_Drill_Saw_Drill_Bit\"><\/span><a><\/a>15.               \u03a4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03c1\u03b9\u03cc\u03bd\u03b9 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/15d.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/15d-1024x1024.jpg\" alt=\"\u03c0\u03c1\u03b9\u03cc\u03bd\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd\" class=\"wp-image-17700\" title=\"\" srcset=\"https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/15d-1024x1024.jpg 1024w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/15d-980x980.jpg 980w, https:\/\/aludiecasting.com\/wp-content\/uploads\/2024\/11\/15d-480x480.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/a><\/figure>\n\n\n\n<p>\u03a4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c5\u03c0\u03b5\u03cd\u03b8\u03c5\u03bd\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03bf\u03c0\u03ae \u03b1\u03ba\u03b1\u03bd\u03cc\u03bd\u03b9\u03c3\u03c4\u03c9\u03bd \u03c3\u03c7\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd. \u0391\u03c5\u03c4\u03cc \u03b5\u03bc\u03c0\u03af\u03c0\u03c4\u03b5\u03b9 \u03c3\u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b7\u03b3\u03bf\u03c1\u03af\u03b1 \u03c4\u03c9\u03bd \u03c5\u03bb\u03b9\u03ba\u03ce\u03bd \u03be\u03cd\u03bb\u03bf\u03c5. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c3\u03c5\u03bd\u03b4\u03c5\u03ac\u03b6\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c0\u03c1\u03b9\u03bf\u03bd\u03af\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2, \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03b9\u03b6\u03cc\u03bc\u03b5\u03bd\u03bf \u03c4\u03b9\u03c2 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ad\u03c2 \u03bc\u03bf\u03bd\u03b1\u03b4\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03bf\u03c5 \u03ad\u03c1\u03b3\u03bf\u03c5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Features_and_Coatings_of_Drill_Bits\"><\/span><a><\/a>\u03a7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ce\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_bit_Features\"><\/span><a><\/a>\u03a7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u039f\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b1\u03c1\u03ba\u03b5\u03c4\u03ac \u03ba\u03bf\u03bc\u03c8\u03ac \u03cc\u03c3\u03bf\u03bd \u03b1\u03c6\u03bf\u03c1\u03ac \u03c4\u03cc\u03c3\u03bf \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03bf\u03c7\u03ae \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03ac \u03c4\u03bf\u03c5\u03c2. \u0393\u03b9\u03b1 \u03c4\u03bf \u03c3\u03ba\u03bf\u03c0\u03cc \u03b1\u03c5\u03c4\u03cc, \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af\u03c4\u03b5 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03c2 \u03bf\u03c0\u03ad\u03c2. \u0395\u03b4\u03ce, \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03bb\u03ac\u03b2\u03b5\u03c4\u03b5 \u03bc\u03b9\u03b1 \u03b1\u03c0\u03cc\u03c6\u03b1\u03c3\u03b7 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c4\u03c5\u03c0\u03b9\u03ba\u03ae \u03ae \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b7 \u03c4\u03bf\u03c0\u03bf\u03b8\u03ad\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03bf\u03bc\u03bc\u03b1\u03c4\u03b9\u03bf\u03cd. \u0388\u03c4\u03c3\u03b9 \u03ce\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03b5\u03cd\u03b3\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03c5\u03c0\u03b5\u03c1\u03b2\u03bf\u03bb\u03b9\u03ba\u03ae \u03c0\u03b1\u03c1\u03b1\u03b3\u03c9\u03b3\u03ae \u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2, \u03b7 \u03c3\u03c4\u03c1\u03ad\u03b2\u03bb\u03c9\u03c3\u03b7 \u03ae \u03b7 \u03b8\u03ac\u03bc\u03c0\u03c9\u03c3\u03b7 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03ad\u03bd\u03c4\u03bf\u03bd\u03c9\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03b9\u03ce\u03bd.<\/p>\n\n\n\n<p>\u0394\u03b9\u03b1\u03c4\u03af\u03b8\u03b5\u03bd\u03c4\u03b1\u03b9 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03c3\u03c7\u03ae\u03bc\u03b1\u03c4\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03c3\u03c4\u03c1\u03b9\u03c6\u03c4\u03ac \u03ae \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9\u03b1, \u03ba\u03b1\u03b9 \u03bc\u03b5\u03b3\u03ad\u03b8\u03b7. \u039c\u03b9\u03b1 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b5\u03b4\u03ce \u03b5\u03be\u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03b5\u03af \u03c4\u03b9\u03c2 \u03c0\u03bf\u03b9\u03ba\u03af\u03bb\u03b5\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03c5\u03b1\u03af\u03c3\u03b8\u03b7\u03c4\u03b7 \u03ba\u03b1\u03c4\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03be\u03cd\u03bb\u03bf\u03c5 \u03ad\u03c9\u03c2 \u03c4\u03b7 \u03b3\u03b5\u03ce\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2 \u03b2\u03b1\u03c1\u03ad\u03c9\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_Bit_Coatings\"><\/span><a><\/a>\u0395\u03c0\u03b9\u03ba\u03b1\u03bb\u03cd\u03c8\u03b5\u03b9\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u039f\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ce\u03c3\u03b5\u03b9\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b1\u03c5\u03be\u03ae\u03c3\u03bf\u03c5\u03bd \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b7 \u03bc\u03b1\u03ba\u03c1\u03bf\u03b6\u03c9\u03af\u03b1. \u03a4\u03b1 \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c0\u03b9\u03ba\u03b1\u03bb\u03c5\u03bc\u03bc\u03ad\u03bd\u03b1 \u03bc\u03b5 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Titanium_nitride\" target=\"_blank\" rel=\"noopener\">\u03bd\u03b9\u03c4\u03c1\u03af\u03b4\u03b9\u03bf \u03c4\u03b9\u03c4\u03b1\u03bd\u03af\u03bf\u03c5<\/a> (TiN) \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bc\u03b2\u03b1\u03c4\u03ac \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03ad\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7 \u03c6\u03b8\u03bf\u03c1\u03ac \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03bc\u03b5\u03b9\u03ce\u03bd\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03c4\u03c1\u03b9\u03b2\u03ae. \u0391\u03c5\u03c4\u03ad\u03c2 \u03bf\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ce\u03c3\u03b5\u03b9\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03cd\u03bd \u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03bb\u03bb\u03b9\u03ba\u03bf\u03cd \u03be\u03cd\u03bb\u03bf\u03c5 \u03c3\u03b5 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03b2\u03b5\u03bb\u03c4\u03b9\u03c9\u03bc\u03ad\u03bd\u03c9\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03b9\u03ce\u03bd \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.garagejournal.com\/forum\/threads\/black-oxide-vs-black-gold-drill-bits.381584\/\" target=\"_blank\" rel=\"noopener\">\u039a\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03ba\u03ac\u03bb\u03c5\u03c8\u03b7 \u03bc\u03b1\u03cd\u03c1\u03bf\u03c5 \u03bf\u03be\u03b5\u03b9\u03b4\u03af\u03bf\u03c5<\/a> \u03c0\u03c1\u03bf\u03c3\u03b8\u03ad\u03c4\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b1\u03bd\u03b8\u03b5\u03ba\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c3\u03c4\u03b7 \u03b4\u03b9\u03ac\u03b2\u03c1\u03c9\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03b1\u03bd\u03b8\u03b5\u03ba\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03b3\u03b5\u03bd\u03b9\u03ba\u03ae \u03c7\u03c1\u03ae\u03c3\u03b7.<\/p>\n\n\n\n<p><a href=\"https:\/\/home.howstuffworks.com\/diamond-drill-bits.htm\" target=\"_blank\" rel=\"noopener\">\u039a\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03ba\u03ac\u03bb\u03c5\u03c8\u03b7 \u03b4\u03b9\u03b1\u03bc\u03b1\u03bd\u03c4\u03b9\u03bf\u03cd<\/a> \u03c5\u03c0\u03bf\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03bf\u03c5\u03bd \u03c4\u03ad\u03c4\u03bf\u03b9\u03b5\u03c2 \u03b1\u03b9\u03c3\u03b8\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03c3\u03b5\u03b9\u03c2. \u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03bf\u03c0\u03ae \u03c3\u03ba\u03bb\u03b7\u03c1\u03ce\u03bd \u03c5\u03bb\u03b9\u03ba\u03ce\u03bd \u03cc\u03c0\u03c9\u03c2 \u03c4\u03b1 \u03b3\u03c5\u03ac\u03bb\u03b9\u03bd\u03b1 \u03c0\u03bb\u03b1\u03ba\u03af\u03b4\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03c0\u03ad\u03c4\u03c1\u03b1. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03bc\u03cc\u03bd\u03bf \u03b3\u03b9\u03b1 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ad\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2, \u03b1\u03bb\u03bb\u03ac \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b1\u03c0\u03b1\u03c1\u03ac\u03bc\u03b9\u03bb\u03bb\u03b7 \u03c3\u03ba\u03bb\u03b7\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Matching_Drill_Bits_to_Workpieces\"><\/span><a><\/a>\u0391\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03af\u03c7\u03b9\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03bc\u03b5 \u03c4\u03b1 \u03c4\u03b5\u03bc\u03ac\u03c7\u03b9\u03b1 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Compatibility\"><\/span><a><\/a>\u03a3\u03c5\u03bc\u03b2\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c7\u03ad\u03b4\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03b5\u03bc\u03b1\u03c7\u03af\u03bf\u03c5 \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03b6\u03bf\u03c5\u03bd \u03ac\u03bc\u03b5\u03c3\u03b1 \u03c4\u03b7\u03bd \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd. \u039c\u03cd\u03c4\u03b5\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03c4\u03bf \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9 \u03ae \u03c4\u03bf bard point \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b1 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03b3\u03b9\u03b1 \u03bf\u03c0\u03bf\u03b9\u03b5\u03c3\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03bf\u03c0\u03ad\u03c2 \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03b1\u03c2 \u03c3\u03c4\u03bf \u03be\u03cd\u03bb\u03bf.<\/p>\n\n\n\n<p>\u0395\u03bd \u03c4\u03c9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd, \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bc\u03b2\u03b1\u03c4\u03ad\u03c2 \u03bc\u03b5 \u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac \u03b1\u03c0\u03cc \u03c3\u03ba\u03c5\u03c1\u03cc\u03b4\u03b5\u03bc\u03b1. \u03a4\u03b1 \u03bc\u03b5\u03c4\u03b1\u03bb\u03bb\u03b9\u03ba\u03ac \u03b5\u03be\u03b1\u03c1\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03bf\u03c5 \u03bd\u03b1 \u03b1\u03bd\u03c4\u03ad\u03c7\u03b5\u03b9 \u03c3\u03c4\u03b7 \u03b8\u03b5\u03c1\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c4\u03c1\u03b9\u03b2\u03ae.<\/p>\n\n\n\n<p>\u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bf\u03b9 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ad\u03c2 \u03bd\u03b9\u03c4\u03c1\u03b9\u03b4\u03af\u03bf\u03c5 \u03c4\u03bf\u03c5 \u03c4\u03b9\u03c4\u03b1\u03bd\u03af\u03bf\u03c5 \u03ae \u03ba\u03bf\u03b2\u03b1\u03bb\u03c4\u03af\u03bf\u03c5 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03ba\u03ac\u03bb\u03c5\u03c8\u03b7. \u039f \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03cc\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c9\u03c3\u03c4\u03bf\u03cd \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1\u03c2 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ac \u03bf\u03c1\u03b8\u03bf\u03bb\u03bf\u03b3\u03b9\u03ba\u03cc\u03c2 \u03c4\u03c1\u03cc\u03c0\u03bf\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03bb\u03b1\u03c7\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c6\u03b8\u03bf\u03c1\u03ac\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03cd\u03be\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Hole_Cleaning_Techniques\"><\/span><a><\/a>\u03a4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b8\u03b1\u03c1\u03b9\u03c3\u03bc\u03bf\u03cd \u03bf\u03c0\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0391\u03c6\u03bf\u03cd \u03b4\u03b9\u03b1\u03bd\u03bf\u03b9\u03c7\u03b8\u03b5\u03af \u03b7 \u03c4\u03c1\u03cd\u03c0\u03b1, \u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9 \u03b3\u03b9\u03b1 \u03ba\u03b1\u03b8\u03b1\u03c1\u03b9\u03c3\u03bc\u03cc \u03b1\u03c0\u03cc \u03c3\u03c5\u03bd\u03c4\u03c1\u03af\u03bc\u03bc\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03ba\u03cc\u03bd\u03b7 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b2\u03b5\u03bb\u03c4\u03b9\u03c9\u03b8\u03b5\u03af \u03b7 \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1. \u0395\u03b4\u03ce, \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03b1\u03c5\u03bb\u03b1\u03ba\u03c9\u03c4\u03ad\u03c2 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b2\u03bf\u03b7\u03b8\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03b2\u03bf\u03bb\u03ae \u03c4\u03c9\u03bd \u03c5\u03c0\u03bf\u03bb\u03b5\u03b9\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd.<\/p>\n\n\n\n<p>\u03a4\u03bf <a href=\"https:\/\/www.researchgate.net\/publication\/331121934_Diamond_core_drilling_process_using_intermittent_flushing_mode\" target=\"_blank\" rel=\"noopener\">\u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03ba\u03bf\u03c0\u03c4\u03cc\u03bc\u03b5\u03bd\u03b7\u03c2 \u03c0\u03b1\u03cd\u03c3\u03b7\u03c2<\/a> \u03c3\u03b1\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c6\u03c5\u03c3\u03ae\u03be\u03b5\u03c4\u03b5 \u03ae \u03bd\u03b1 \u03c3\u03ba\u03bf\u03c5\u03c0\u03af\u03c3\u03b5\u03c4\u03b5 \u03bc\u03b5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ae \u03c3\u03ba\u03bf\u03cd\u03c0\u03b1 \u03c4\u03b7 \u03c3\u03ba\u03cc\u03bd\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2. \u0391\u03c5\u03c4\u03ac \u03c4\u03b1 \u03b2\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b3\u03af\u03bd\u03bf\u03c5\u03bd \u03b5\u03ba\u03b5\u03af, \u03cc\u03c3\u03bf\u03bd \u03b1\u03c6\u03bf\u03c1\u03ac \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03c4\u03b5\u03c5\u03be\u03b7 \u03c5\u03c8\u03b7\u03bb\u03ae\u03c2 \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03ac\u03c4\u03b1\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1\u03c2 \u03b6\u03c9\u03ae\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03bf\u03cd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Practical_Drill_Bit_Applications\"><\/span><a><\/a>\u03a0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_Bit_Sizes_and_Shapes\"><\/span><a><\/a>\u039c\u03b5\u03b3\u03ad\u03b8\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03c7\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0388\u03bd\u03b1 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf \u03c3\u03c7\u03ae\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03bc\u03ad\u03b3\u03b5\u03b8\u03bf\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03b8\u03b1 \u03b5\u03be\u03b1\u03c3\u03c6\u03ac\u03bb\u03b9\u03b6\u03b5 \u03cc\u03c4\u03b9 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b8\u03b1 \u03c0\u03b1\u03c1\u03b5\u03af\u03c7\u03b5 \u03b1\u03ba\u03c1\u03b9\u03b2\u03ae \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1. \u03a0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03b5\u03b9 \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03ac\u03b3\u03ba\u03b5\u03c2 \u03c3\u03b1\u03c2 \u03c3\u03b5 \u03bf\u03c0\u03bf\u03b9\u03b1\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae.<\/p>\n\n\n\n<p>\u0388\u03bd\u03b1 \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf \u03ae \u03bc\u03b9\u03ba\u03c1\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b4\u03b9\u03b5\u03c5\u03ba\u03bf\u03bb\u03cd\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c3\u03b1\u03c2, \u03b1\u03c0\u03cc \u03c4\u03bf \u03c0\u03c1\u03cc\u03c7\u03b5\u03b9\u03c1\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03ad\u03c7\u03c1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03b1\u03c2, \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b1.<\/p>\n\n\n\n<p>\u038c\u03c0\u03c9\u03c2 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b1\u03bc\u03b5 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bf\u03c5\u03bc\u03ad\u03bd\u03c9\u03c2, \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c3\u03c5\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03bf\u03cd\u03bd \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b3\u03b9\u03b1 \u03b5\u03c5\u03ad\u03bb\u03b9\u03ba\u03c4\u03b5\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2- \u03b5\u03bd \u03c4\u03c9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd, \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03bc\u03b5 \u03c3\u03c6\u03ae\u03bd\u03b5\u03c2 \u03ae \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03bc\u03b5 \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9\u03b1 \u03b2\u03bf\u03b7\u03b8\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7 \u03be\u03cd\u03bb\u03bf\u03c5.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03b2\u03b5\u03b2\u03b1\u03b9\u03ce\u03c3\u03c4\u03b5 \u03cc\u03c4\u03b9 \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c4\u03b1\u03b9\u03c1\u03b9\u03ac\u03b6\u03bf\u03c5\u03bd \u03b1\u03ba\u03c1\u03b9\u03b2\u03ce\u03c2 \u03bc\u03b5 \u03c4\u03bf \u03bc\u03ad\u03b3\u03b5\u03b8\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c7\u03ae\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03b5\u03bc\u03b1\u03c7\u03af\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2, \u03b5\u03c0\u03b9\u03c4\u03c5\u03b3\u03c7\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03b8\u03c5\u03bc\u03b7\u03c4\u03ae \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drill_Bit_Uses\"><\/span><a><\/a>\u03a7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0391\u03c5\u03c4\u03ac \u03c4\u03b1 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b1 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03c3\u03ac\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bd \u03bd\u03b1 \u03b1\u03bd\u03bf\u03af\u03b3\u03b5\u03c4\u03b5 \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03b5\u03af\u03b4\u03bf\u03c5\u03c2 \u03c5\u03bb\u03b9\u03ba\u03cc, \u03b5\u03af\u03c4\u03b5 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ac\u03b6\u03b5\u03c4\u03b5 \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03bf, \u03be\u03cd\u03bb\u03bf, \u03c0\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc \u03ae \u03c3\u03ba\u03c5\u03c1\u03cc\u03b4\u03b5\u03bc\u03b1. \u0397 \u03c3\u03c9\u03c3\u03c4\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03b5\u03be\u03b1\u03bb\u03b5\u03af\u03c6\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03c0\u03b9\u03b8\u03b1\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b1\u03c3\u03c4\u03bf\u03c7\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b6\u03b7\u03bc\u03b9\u03ac\u03c2 \u03c3\u03c4\u03b1 \u03c4\u03b5\u03bc\u03ac\u03c7\u03b9\u03b1 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Change_Drill_Bits\"><\/span><a><\/a>\u03a0\u03ce\u03c2 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03ac\u03b6\u03b5\u03c4\u03b5 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0394\u03b5\u03bd \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b3\u03bd\u03ce\u03c3\u03b5\u03b9\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd, \u03b1\u03bb\u03bb\u03ac \u03b3\u03b9\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03b1\u03c1\u03c7\u03ac\u03c1\u03b9\u03bf\u03c5\u03c2, \u03b1\u03c5\u03c4\u03ac \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03bb\u03af\u03b3\u03b1 \u03b2\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03ae\u03c3\u03b5\u03c4\u03b5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0392\u03b5\u03b2\u03b1\u03b9\u03c9\u03b8\u03b5\u03af\u03c4\u03b5 \u03cc\u03c4\u03b9 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bd\u03b4\u03b5\u03b4\u03b5\u03bc\u03ad\u03bd\u03bf \u03bc\u03b5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c1\u03b5\u03cd\u03bc\u03b1 \u03ae \u03bc\u03c0\u03b1\u03c4\u03b1\u03c1\u03af\u03b1.<\/li>\n\n\n\n<li>\u03a0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03ad\u03c8\u03c4\u03b5 \u03c4\u03bf \u03c4\u03c3\u03bf\u03ba \u03b1\u03c1\u03b9\u03c3\u03c4\u03b5\u03c1\u03cc\u03c3\u03c4\u03c1\u03bf\u03c6\u03b1 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c7\u03b1\u03bb\u03b1\u03c1\u03ce\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03bb\u03b1\u03b2\u03ae \u03c4\u03bf\u03c5.<\/li>\n\n\n\n<li>\u0391\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c0\u03b1\u03bb\u03b9\u03cc \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9 \u03bc\u03b5 \u03c4\u03bf \u03bd\u03ad\u03bf.<\/li>\n\n\n\n<li>\u03a0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03ad\u03c8\u03c4\u03b5 \u03c4\u03bf \u03c4\u03c3\u03bf\u03ba \u03b4\u03b5\u03be\u03b9\u03cc\u03c3\u03c4\u03c1\u03bf\u03c6\u03b1 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c4\u03bf \u03c3\u03c6\u03af\u03be\u03b5\u03c4\u03b5 \u03bc\u03b5 \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1.<\/li>\n\n\n\n<li>\u03a4\u03ad\u03bb\u03bf\u03c2, \u03c3\u03c5\u03bd\u03b4\u03ad\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03bc\u03b5 \u03c4\u03bf \u03c1\u03b5\u03cd\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03ba\u03ac\u03bd\u03c4\u03b5 \u03c4\u03b7 \u03b4\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03ae \u03bf\u03c0\u03ae \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b5\u03af\u03c4\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c5\u03b8\u03c5\u03b3\u03c1\u03ac\u03bc\u03bc\u03b9\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03ba\u03c1\u03ac\u03c4\u03b7\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Troubleshooting_and_Advanced_Knowledge\"><\/span><a><\/a>\u0391\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03ce\u03c0\u03b9\u03c3\u03b7 \u03c0\u03c1\u03bf\u03b2\u03bb\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b3\u03bd\u03ce\u03c3\u03b5\u03b9\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Differential_Sticking\"><\/span><a><\/a>\u0394\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03cc \u03ba\u03bf\u03bb\u03bb\u03ac\u03b5\u03b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a0\u03ce\u03c2 \u03ba\u03b1\u03b9 \u03b3\u03b9\u03b1\u03c4\u03af<a href=\"https:\/\/glossary.slb.com\/en\/terms\/d\/differential_sticking\" target=\"_blank\" rel=\"noopener\"> <\/a><a href=\"https:\/\/glossary.slb.com\/en\/terms\/d\/differential_sticking\" target=\"_blank\" rel=\"noopener\">\u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03cc \u03ba\u03cc\u03bb\u03bb\u03b7\u03bc\u03b1<\/a> \u03c3\u03c5\u03bc\u03b2\u03b1\u03af\u03bd\u03b5\u03b9; \u039f \u03bb\u03cc\u03b3\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03c4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b1\u03ba\u03b9\u03bd\u03b7\u03c4\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9. \u0391\u03c5\u03c4\u03cc \u03bf\u03c6\u03b5\u03af\u03bb\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b1\u03bd\u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03af\u03b5\u03c2 \u03c0\u03af\u03b5\u03c3\u03b7\u03c2 \u03ae \u03c3\u03c4\u03b7 \u03c3\u03c5\u03c3\u03c3\u03ce\u03c1\u03b5\u03c5\u03c3\u03b7 \u03b8\u03c1\u03b1\u03c5\u03c3\u03bc\u03ac\u03c4\u03c9\u03bd. \u0391\u03c5\u03c4\u03cc \u03c3\u03c5\u03bc\u03b2\u03b1\u03af\u03bd\u03b5\u03b9 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c3\u03b5 \u03b1\u03c0\u03b1\u03b9\u03c4\u03b7\u03c4\u03b9\u03ba\u03ac \u03ad\u03c1\u03b3\u03b1.<\/p>\n\n\n\n<p>\u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03c9\u03c0\u03af\u03c3\u03b5\u03c4\u03b5 \u03b1\u03c5\u03c4\u03ac \u03c4\u03b1 \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03bb\u03af\u03c0\u03b1\u03bd\u03c3\u03b7\u03c2. \u0397 \u03c3\u03c9\u03c3\u03c4\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03c4\u03bf\u03c5 \u03bc\u03b5\u03b3\u03ad\u03b8\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03c3\u03c7\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc \u03ad\u03c7\u03b5\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03bf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overcoming_Challenges_with_Unfamiliar_Materials\"><\/span><a><\/a>\u039e\u03b5\u03c0\u03b5\u03c1\u03bd\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b9\u03c2 \u03c0\u03c1\u03bf\u03ba\u03bb\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5 \u03ac\u03b3\u03bd\u03c9\u03c3\u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0391\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03c5\u03c7\u03b1\u03af\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03c3\u03b5 \u03c5\u03bb\u03b9\u03ba\u03ac \u03bc\u03b5 \u03c4\u03b1 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b4\u03b5\u03bd \u03b5\u03af\u03c3\u03c4\u03b5 \u03b5\u03be\u03bf\u03b9\u03ba\u03b5\u03b9\u03c9\u03bc\u03ad\u03bd\u03bf\u03b9, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b1\u03c5\u03c4\u03cc \u03bf\u03b4\u03b7\u03b3\u03b5\u03af \u03c3\u03b5 \u03c6\u03b8\u03bf\u03c1\u03ac \u03ae \u03b1\u03bd\u03b5\u03c0\u03b1\u03c1\u03ba\u03ae \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7.<\/p>\n\n\n\n<p>\u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03c4\u03bf \u03ba\u03b1\u03bb\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 <a href=\"https:\/\/en.wikipedia.org\/wiki\/List_of_materials_properties\" target=\"_blank\" rel=\"noopener\">\u03b9\u03b4\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd<\/a> \u03ba\u03b1\u03b9 <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0020768316303699\" target=\"_blank\" rel=\"noopener\">\u03b9\u03b4\u03ad\u03b5\u03c2<\/a> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03b9\u03b1\u03b8\u03ad\u03c3\u03b9\u03bc\u03b1 \u03c3\u03b5 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03c4\u03c5\u03b1\u03ba\u03ad\u03c2 \u03c0\u03bb\u03b1\u03c4\u03c6\u03cc\u03c1\u03bc\u03b5\u03c2. \u0395\u03be\u03b5\u03c1\u03b5\u03c5\u03bd\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c5\u03c4\u03cc, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03be\u03b5\u03c0\u03b5\u03c1\u03ac\u03c3\u03b5\u03c4\u03b5 \u03b1\u03c5\u03c4\u03ac \u03c4\u03b1 \u03ba\u03b5\u03bd\u03ac.<\/p>\n\n\n\n<p>\u03a0\u03b1\u03c1' \u03cc\u03bb\u03b1 \u03b1\u03c5\u03c4\u03ac, \u03c3\u03c5\u03bc\u03b2\u03bf\u03c5\u03bb\u03b5\u03c5\u03c4\u03b5\u03af\u03c4\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03b1\u03c3\u03c4\u03ad\u03c2 \u03ae \u03b4\u03bf\u03ba\u03b9\u03bc\u03ac\u03c3\u03c4\u03b5 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03bf\u03cd\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03ba\u03bf\u03c0\u03c4\u03b9\u03ba\u03ce\u03bd \u03c3\u03b5 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03b1 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03ac\u03b8\u03b5\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03ad\u03c2 \u03c4\u03bf\u03c5\u03c2.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><a><\/a>\u03a3\u03c5\u03bc\u03c0\u03ad\u03c1\u03b1\u03c3\u03bc\u03b1:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u039a\u03ac\u03bd\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03ad\u03be\u03c5\u03c0\u03bd\u03bf \u03b2\u03ae\u03bc\u03b1 \u03b5\u03c0\u03b9\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c3\u03c9\u03c3\u03c4\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03c0\u03bf\u03c5 \u03c4\u03b1\u03b9\u03c1\u03b9\u03ac\u03b6\u03b5\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c3\u03b1\u03c2 \u03c3\u03b5 \u03c5\u03bb\u03b9\u03ba\u03cc. \u0397 \u03b3\u03bd\u03ce\u03c3\u03b7 \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03c4\u03cd\u03c0\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b7 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c0\u03bf\u03c5 \u03b4\u03b5\u03bd \u03b8\u03b1 \u03c3\u03c0\u03ac\u03c3\u03b5\u03b9 \u03c4\u03bf \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b5\u03b3\u03b3\u03c5\u03ac\u03c4\u03b1\u03b9 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03bc\u03b1\u03ba\u03c1\u03bf\u03b6\u03c9\u03af\u03b1. \u0391\u03c5\u03c4\u03cc \u03b5\u03be\u03b1\u03bb\u03b5\u03af\u03c6\u03b5\u03b9 \u03c4\u03b1 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1, \u03c4\u03b9\u03c2 \u03b6\u03b7\u03bc\u03b9\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03c5\u03c7\u03af\u03b1 \u03c4\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf\u03c5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>\u03a3\u03c5\u03c7\u03bd\u03ad\u03c2 \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>\u03a0\u03bf\u03b9\u03bf\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u03b9 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03bf\u03af \u03c4\u03cd\u03c0\u03bf\u03b9 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u03a3\u03c4\u03c1\u03b9\u03c6\u03c4\u03ac\u03c1\u03b9\u03b1, \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9\u03b1, \u03c0\u03c1\u03b9\u03cc\u03bd\u03b9\u03b1 \u03bf\u03c0\u03ce\u03bd, Forstner \u03ba\u03b1\u03b9 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2.<\/p>\n\n\n\n<p><strong>\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03b5\u03c0\u03b9\u03bb\u03ad\u03be\u03c9 \u03c4\u03bf \u03c3\u03c9\u03c3\u03c4\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03bc\u03bf\u03c5;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u0395\u03be\u03b5\u03c4\u03ac\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc, \u03c4\u03bf \u03bc\u03ad\u03b3\u03b5\u03b8\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03bf\u03c0\u03ae\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd \u03c4\u03cd\u03c0\u03bf \u03c4\u03bf\u03c5 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd.<\/p>\n\n\n\n<p><strong>\u03a0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ac \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b5\u03bd\u03cc\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03bc\u03b5 \u03c3\u03c0\u03b5\u03af\u03c1\u03c9\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03bd\u03cc\u03c2 \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03bf\u03cd \u03bc\u03b5 \u03c6\u03c4\u03c5\u03ac\u03c1\u03b9;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u039f\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c3\u03c4\u03c1\u03ad\u03c8\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03bc\u03ad\u03c4\u03b1\u03bb\u03bb\u03bf\/\u03be\u03cd\u03bb\u03bf, \u03bf\u03b9 \u03bc\u03cd\u03c4\u03b5\u03c2 \u03c6\u03c4\u03c5\u03b1\u03c1\u03b9\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03bc\u03b5\u03b3\u03ac\u03bb\u03b5\u03c2 \u03c4\u03c1\u03cd\u03c0\u03b5\u03c2 \u03c3\u03b5 \u03be\u03cd\u03bb\u03bf.<\/p>\n\n\n\n<p><strong>\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03b1\u03ba\u03bf\u03bd\u03af\u03c3\u03c9 \u03ad\u03bd\u03b1 \u03b8\u03b1\u03bc\u03c0\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03b1\u03ba\u03bf\u03bd\u03b9\u03c3\u03c4\u03ae\u03c1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03ae \u03bc\u03b9\u03b1 \u03bb\u03b5\u03af\u03b1\u03bd\u03c3\u03b7.<\/p>\n\n\n\n<p>\u03a0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b3\u03b9\u03b1 \u03b4\u03b9\u03ac\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c3\u03ba\u03c5\u03c1\u03bf\u03b4\u03ad\u03bc\u03b1\u03c4\u03bf\u03c2;<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u039c\u03c0\u03bf\u03c5\u03bb\u03cc\u03bd\u03b9\u03b1 \u03c4\u03bf\u03b9\u03c7\u03bf\u03c0\u03bf\u03b9\u03af\u03b1\u03c2.<\/p>\n\n\n\n<p><strong>\u039c\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c9 \u03bc\u03b5\u03c4\u03b1\u03bb\u03bb\u03b9\u03ba\u03cc \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ae\u03c3\u03c9 \u03be\u03cd\u03bb\u03bf;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u038c\u03c7\u03b9, \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9 \u03be\u03cd\u03bb\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c3\u03c0\u03b1\u03c3\u03b7.<\/p>\n\n\n\n<p><strong>\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c4\u03c1\u03ad\u03c8\u03c9 \u03c4\u03bf \u03c3\u03c0\u03ac\u03c3\u03b9\u03bc\u03bf \u03c4\u03c9\u03bd \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c3\u03c9\u03c3\u03c4\u03cc \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf, \u03b1\u03c3\u03ba\u03ae\u03c3\u03c4\u03b5 \u03ae\u03c0\u03b9\u03b1 \u03c0\u03af\u03b5\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03c4\u03b5 \u03c4\u03b1 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03ba\u03bf\u03c6\u03c4\u03b5\u03c1\u03ac.<\/p>\n\n\n\n<p><strong>\u03a0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03c5\u03bb\u03b9\u03ba\u03ac \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ae \u03c4\u03c1\u03c5\u03c0\u03b1\u03bd\u03b9\u03ce\u03bd;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>HSS, HSS \u03bc\u03b5 \u03b5\u03c0\u03b9\u03ba\u03ac\u03bb\u03c5\u03c8\u03b7 \u03c4\u03b9\u03c4\u03b1\u03bd\u03af\u03bf\u03c5, \u03c7\u03ac\u03bb\u03c5\u03b2\u03b1\u03c2 \u03ba\u03bf\u03b2\u03b1\u03bb\u03c4\u03af\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03ba\u03b1\u03c1\u03b2\u03af\u03b4\u03b9\u03bf \u03b2\u03bf\u03bb\u03c6\u03c1\u03b1\u03bc\u03af\u03bf\u03c5.<\/p>\n\n\n\n<p><strong>\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03c9 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c3\u03c5\u03bd\u03c4\u03b7\u03c1\u03ce \u03c3\u03c9\u03c3\u03c4\u03ac \u03c4\u03b1 \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1 \u03bc\u03bf\u03c5;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u0391\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03c3\u03c4\u03b5 \u03c4\u03b1 \u03c3\u03b5 \u03be\u03b7\u03c1\u03cc \u03bc\u03ad\u03c1\u03bf\u03c2, \u03ba\u03b1\u03b8\u03b1\u03c1\u03af\u03b6\u03b5\u03c4\u03b5 \u03c4\u03b1\u03ba\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b1\u03ba\u03bf\u03bd\u03af\u03b6\u03b5\u03c4\u03b5 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03ac\u03b3\u03ba\u03b5\u03c2.<\/p>\n\n\n\n<p><strong>\u03a0\u03bf\u03b9\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03c1\u03bf\u03c6\u03c5\u03bb\u03ac\u03be\u03b5\u03b9\u03c2 \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03c9 \u03cc\u03c4\u03b1\u03bd \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce \u03c4\u03c1\u03c5\u03c0\u03ac\u03bd\u03b9\u03b1;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p>\u03a6\u03bf\u03c1\u03ad\u03c3\u03c4\u03b5 \u03b3\u03c5\u03b1\u03bb\u03b9\u03ac \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2, \u03ba\u03c1\u03b1\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c4\u03b1 \u03c6\u03b1\u03c1\u03b4\u03b9\u03ac \u03c1\u03bf\u03cd\u03c7\u03b1 \u03b4\u03b5\u03bc\u03ad\u03bd\u03b1 \u03c0\u03af\u03c3\u03c9 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5 \u03c4\u03bf \u03c5\u03c0\u03b5\u03c1\u03b2\u03bf\u03bb\u03b9\u03ba\u03cc \u03ac\u03bd\u03bf\u03b9\u03b3\u03bc\u03b1.<\/p>","protected":false},"excerpt":{"rendered":"<p>Drill bits are cutting tools attached to drilling machines to make holes. There are fifteen types of drill bits. Twist drill bits are used for general drilling. Brad point bits prevent wood from splitting. Forstner bits make flat-bottomed holes in wood. Hole saws remove large, circular pieces. Masonry bits are for drilling into concrete and [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":17701,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-17682","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aluminium-alloy-castings"],"_links":{"self":[{"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/posts\/17682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/comments?post=17682"}],"version-history":[{"count":0,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/posts\/17682\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/media\/17701"}],"wp:attachment":[{"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/media?parent=17682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/categories?post=17682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aludiecasting.com\/el\/wp-json\/wp\/v2\/tags?post=17682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}