{"id":9408,"date":"2024-12-19T09:19:18","date_gmt":"2024-12-19T09:19:18","guid":{"rendered":"https:\/\/gaspariutensili.it\/uncategorized\/lamatori-in-shooting\/"},"modified":"2025-03-18T16:16:57","modified_gmt":"2025-03-18T16:16:57","slug":"lamatori-in-shooting","status":"publish","type":"post","link":"https:\/\/gaspariutensili.it\/en\/technical-articles\/lamatori-in-shooting\/","title":{"rendered":"Pull counterboring tools"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"9408\" class=\"elementor elementor-9408 elementor-2502\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e9ab26d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e9ab26d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-36c0b1a\" data-id=\"36c0b1a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1bf6b43 elementor-widget elementor-widget-heading\" data-id=\"1bf6b43\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">BACK SPOT FACING<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b8a9e60 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b8a9e60\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9c8b349\" data-id=\"9c8b349\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f100577 elementor-widget elementor-widget-text-editor\" data-id=\"f100577\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Back-facing<\/strong> is a calibrated <strong>facing process performed around a hole.<\/strong> This machining is carried out &#8220;in pull&#8221;, ie the spindle of the machine tool moves away from the piece during the work phase. <strong>The surface that is generated on the piece is generally used as a support for a washer<\/strong> , so that this has a flat contact surface.\nThe orthogonality of the counterbore with the hole guarantees maximum tightness of the screw acting on the washer.  <\/p>\n<p>Not all back counter bores can be performed with the same strategy.\nIn fact, it is necessary to choose the most suitable tool taking into account the relationship between the diameter of the hole and its length. <\/p>\n<p>For holes whose maximum length is three times the diameter (3xD) and whose counterbore is less than double the diameter of the hole, the <strong>eccentric back<\/strong> -hammer is used.\nOn the other hand, when the counterbore exceeds the diameter of the hole by at least double or the length of the hole is greater than 3xD, the <strong>counterblades with interchangeable blades<\/strong> are used.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-36cd5b9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"36cd5b9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e867410\" data-id=\"e867410\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c8613e0 elementor-widget elementor-widget-spacer\" data-id=\"c8613e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-03f30f0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"03f30f0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4669316\" data-id=\"4669316\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e043246 elementor-widget elementor-widget-heading\" data-id=\"e043246\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">eccentric back stop facing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-803ba66 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"803ba66\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-f2826f0\" data-id=\"f2826f0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4ab0792 elementor-widget elementor-widget-text-editor\" data-id=\"4ab0792\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This type of tool <strong>allows you to enter a hole from the front and perform a facing machining with a calibrated diameter on the opposite face of the piece<\/strong> .\nThe tool is single-edged and can be in solid carbide or mechanically fixed. <\/p>\n<p>To use the eccentric back loom <strong>, the use of a numerically controlled machine is recommended<\/strong> .\nIn fact, this allows to simplify the centering operations on the hole.\nIn the image we see a diagram of the work cycle necessary to perform a back-grinding with an eccentric tool.  <\/p>\n<p>As a preparatory step, the cutting edge must be oriented to zero (spindle orientation = 0). At this point the tool must be moved to the left by the measure deriving from the following formula: counterbore diameter minus hole diameter divided by two. <strong>This will allow the cutting edge of the tool to line up with the hole<\/strong> . It is now possible to enter the hole vertically until it passes the back face of the piece with the cutting edge. Now you can bring the spindle into axis with the hole and activate the clockwise rotation of the spindle M3 and activate the coolant M8. Now perform the back-grinding by advancing the cutting edge towards the workpiece to the desired size. Once the machining is finished, disengage the tool and orient the spindle to the zero position. <strong>Now to be able to exit the hole you have to go left to the same position used in the entry phase.<\/strong><\/p>\n<p>For this type of tools <strong>Gaspari Utensili has developed a catalog of special products obtained from semi-finished products ready in stock.<\/strong>\nThis allows you to request a special eccentric backhoe, specific for your counterbore, with reduced delivery times.\nYou can find the corresponding catalog in the download section of the site.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3385856\" data-id=\"3385856\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3f3512a elementor-widget elementor-widget-image\" data-id=\"3f3512a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"664\" src=\"https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-1024x850.jpg\" class=\"attachment-large size-large wp-image-6875\" alt=\"\" srcset=\"https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-1024x850.jpg 1024w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-300x249.jpg 300w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-768x637.jpg 768w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-1536x1274.jpg 1536w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-2048x1699.jpg 2048w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-95_def-1-600x498.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-33dfce2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"33dfce2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f403451\" data-id=\"f403451\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3d7302b elementor-widget elementor-widget-spacer\" data-id=\"3d7302b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9a22578 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9a22578\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-febe7e3\" data-id=\"febe7e3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-84d72fd elementor-widget elementor-widget-heading\" data-id=\"84d72fd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">interchangeable blade laminator<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1a23d5b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1a23d5b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6e0b209\" data-id=\"6e0b209\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3c11f26 elementor-widget elementor-widget-image\" data-id=\"3c11f26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"2560\" height=\"2124\" src=\"https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1.jpg\" class=\"attachment-full size-full wp-image-6871\" alt=\"\" srcset=\"https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1.jpg 2560w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-300x249.jpg 300w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-1024x850.jpg 1024w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-768x637.jpg 768w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-1536x1274.jpg 1536w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-2048x1699.jpg 2048w, https:\/\/gaspariutensili.it\/wp-content\/uploads\/2024\/12\/Gaspari-94_def-1-600x498.jpg 600w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-d375237\" data-id=\"d375237\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-448da7e elementor-widget elementor-widget-text-editor\" data-id=\"448da7e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This type of tool <strong>can be used both on CNC<\/strong> <strong>machines and on manually operated machines<\/strong> .\nThe processing requires the operator to act manually in assembling and disassembling the blade from the support.\nThe latter in fact <strong>consists of a cylindrical shaft at the end of which there is a rectangular slot, inside which the blade is located.<\/strong>\nThe <strong>cutting blade<\/strong> , generally made of HSS, <strong>is mounted once the shaft has come out of the hole to be machined at the rear<\/strong> .\nThe blade is locked in its centering seat by means of a threaded ring nut.\nNow the operator can start the spindle and counterbore the piece.\nAfter machining, the blade must be removed from its support before the shaft can be extracted from the hole.      <\/p>\n<p>This type of tool <strong>has no length limits<\/strong> , as the <strong>shaft can be guided into the hole by a guide bush<\/strong> .\nIt is a strategy often used in the machining of large counterbores due to the low cost of this technology.  <\/p>\n<p>For this type of tools <strong>Gaspari Utensili has developed a catalog of special products obtained from semi-finished products ready in stock.<\/strong>\nThis allows you to request a special counterbore with interchangeable blades, specific for your counterbore, with reduced delivery times.\nYou can find the corresponding catalog in the download section of the site.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1918f29 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1918f29\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-766f560\" data-id=\"766f560\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-631f855 elementor-widget elementor-widget-spacer\" data-id=\"631f855\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Back-facing is a calibrated facing process performed around a hole.<\/p>\n","protected":false},"author":1,"featured_media":7783,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-9408","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pull counterboring tools - Gaspari<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gaspariutensili.it\/en\/technical-articles\/lamatori-in-shooting\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pull counterboring tools - Gaspari\" \/>\n<meta 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