{"id":56838,"date":"2019-09-20T15:27:54","date_gmt":"2019-09-20T13:27:54","guid":{"rendered":"https:\/\/ertek.p1.zrh01.swissbix.com\/?page_id=56838"},"modified":"2019-10-01T18:31:59","modified_gmt":"2019-10-01T16:31:59","slug":"deep-hole-drilling","status":"publish","type":"page","link":"https:\/\/ertek.it\/?page_id=56838&lang=en","title":{"rendered":"DEEP HOLE DRILLING"},"content":{"rendered":"<section class=\"wpb-content-wrapper\"><p>[vc_row row_height_percent=&#8221;50&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;3&#8243; back_color=&#8221;color-540491&#8243; back_image=&#8221;56974&#8243; back_position=&#8221;center top&#8221; overlay_color=&#8221;accent&#8221; overlay_alpha=&#8221;75&#8243; gutter_size=&#8221;3&#8243; column_width_percent=&#8221;100&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; shape_dividers=&#8221;&#8221;][vc_column column_width_percent=&#8221;100&#8243; position_vertical=&#8221;bottom&#8221; style=&#8221;dark&#8221; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; zoom_width=&#8221;0&#8243; zoom_height=&#8221;0&#8243; width=&#8221;1\/1&#8243;][vc_custom_heading heading_semantic=&#8221;h1&#8243; text_size=&#8221;&#8221; text_font=&#8221;font-762333&#8243; text_weight=&#8221;700&#8243; sub_reduced=&#8221;yes&#8221;]The Deep<br \/>\nHole Drilling[\/vc_custom_heading][\/vc_column][\/vc_row][vc_row row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;3&#8243; overlay_color=&#8221;color-xsdn&#8221; overlay_alpha=&#8221;70&#8243; gutter_size=&#8221;100&#8243; border_color=&#8221;color-gyho&#8221; border_style=&#8221;solid&#8221; shift_y=&#8221;0&#8243; style=&#8221;inherited&#8221; row_name=&#8221;Welcome&#8221; css=&#8221;.vc_custom_1438176136018{border-bottom-width: 1px !important;}&#8221;][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;1&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; width=&#8221;1\/4&#8243;][vc_custom_heading text_size=&#8221;h5&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_transform=&#8221;capitalize&#8221; text_color=&#8221;accent&#8221; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]HIGH MATERIAL REMOVAL RATE WITH HIGH ACCURACY[\/vc_custom_heading][\/vc_column][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; zoom_width=&#8221;0&#8243; zoom_height=&#8221;0&#8243; width=&#8221;3\/4&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_column_text]Deep hole drilling is the machining of holes with a relatively large depth to diameter ratio, whereas normal drilling techniques produce holes where the depth is rarely more than five times the diameter (5 xD). In deep hole drilling the ratio may reach 150:1, and any hole deeper than ten times the diameter (10 xD) should certainly be considered a deep hole, requiring a specialized drilling technique.<br \/>\nDeep hole drilling can employ various machine set-ups: rotating workpiece, rotating tool, or both tool and workpiece rotating. The most common, however, is for the workpiece to rotate, while the tool supplies the linear feed movement.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_column_text]Whichever set-up is employed, the basic principles of drilling still apply, and the correct choice of cutting speeds and feeds are still crucial. Satisfactory chip breaking, and removing the chips from the cutting edges without damaging tool or workpiece, is essential.<br \/>\nGun drilling is capable of producing smaller holes than the Single Tube System (STS), but the STS system is far more productive (4-6 times) and should always be the first choice when possible. The Ejector system is an alternative to STS when drilling smaller batch quantities as it does not require a special machine.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;3&#8243; overlay_color=&#8221;color-xsdn&#8221; overlay_alpha=&#8221;70&#8243; gutter_size=&#8221;100&#8243; border_color=&#8221;color-gyho&#8221; border_style=&#8221;solid&#8221; shift_y=&#8221;0&#8243; style=&#8221;inherited&#8221; row_name=&#8221;Welcome&#8221; css=&#8221;.vc_custom_1438176136018{border-bottom-width: 1px !important;}&#8221;][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;1&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; width=&#8221;1\/4&#8243;][vc_custom_heading text_size=&#8221;h5&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_transform=&#8221;capitalize&#8221; text_color=&#8221;accent&#8221; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]DIFFERENT DEEP HOLE DRILLING SYSTEMS[\/vc_custom_heading][\/vc_column][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; zoom_width=&#8221;0&#8243; zoom_height=&#8221;0&#8243; width=&#8221;3\/4&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/1&#8243;][vc_column_text]In deep hole drilling, a combination of tool design and cutting fluid pressure is used to flush the chips out of the hole. Two different drill systems are common.<br \/>\nAll two systems can produce holes with excellent surface finish, close dimensional tolerance and concentricity.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;3&#8243; overlay_color=&#8221;color-xsdn&#8221; overlay_alpha=&#8221;70&#8243; gutter_size=&#8221;100&#8243; border_color=&#8221;color-gyho&#8221; border_style=&#8221;solid&#8221; shift_y=&#8221;0&#8243; style=&#8221;inherited&#8221; row_name=&#8221;Welcome&#8221; css=&#8221;.vc_custom_1438176136018{border-bottom-width: 1px !important;}&#8221;][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;1&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; width=&#8221;1\/4&#8243;][vc_custom_heading text_size=&#8221;h5&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_transform=&#8221;capitalize&#8221; text_color=&#8221;accent&#8221; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]DIFFERENT DEEP HOLE DRILLING SYSTEMS[\/vc_custom_heading][vc_custom_heading text_size=&#8221;h4&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]The Single Tube System or STS[\/vc_custom_heading][\/vc_column][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; zoom_width=&#8221;0&#8243; zoom_height=&#8221;0&#8243; width=&#8221;3\/4&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_column_text]High pressure pumps supply cutting fluid down the outside of the drill tube, between the drill and the drilled hole.<br \/>\nThe drill shank itself is hollow, and the fluid pressure flushes the chips into the drill body through chiprooms in the drill head, and back out through the drill tube.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_column_text]The high cutting fluid pressure makes the STS-system more reliable than the<br \/>\nEjector system especially when drilling materials where good chipbreaking is<br \/>\ndifficult to obtain, i.e. low carbon steels and stainless.<br \/>\nThe STS-system is always the first choice for long series production.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;3&#8243; overlay_color=&#8221;color-xsdn&#8221; overlay_alpha=&#8221;70&#8243; gutter_size=&#8221;100&#8243; border_style=&#8221;solid&#8221; shift_y=&#8221;0&#8243; style=&#8221;inherited&#8221; row_name=&#8221;Welcome&#8221;][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;1&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; width=&#8221;1\/4&#8243;][vc_custom_heading text_size=&#8221;h5&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_transform=&#8221;capitalize&#8221; text_color=&#8221;accent&#8221; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]DIFFERENT DEEP HOLE DRILLING SYSTEMS[\/vc_custom_heading][vc_custom_heading text_size=&#8221;h4&#8243; text_font=&#8221;font-762333&#8243; text_weight=&#8221;500&#8243; text_align=&#8221;text-left&#8221; text_uppercase=&#8221;&#8221;]Ejector System[\/vc_custom_heading][\/vc_column][vc_column column_width_percent=&#8221;100&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; medium_width=&#8221;0&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; zoom_width=&#8221;0&#8243; zoom_height=&#8221;0&#8243; width=&#8221;3\/4&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/1&#8243;][vc_column_text]Is similar to STS, except that the drill is connected to an inner and outer tube.<br \/>\nCutting fluid is pumped down the drill between the two tubes, i.e. entirely within the drill body rather than externally, and the chips are flushed back out through the inner one, also within the drill body.<br \/>\nThis self-contained system requires less fluid pressure than the STS system and can usually be installed in conventional machine tools without major reconstruction.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>[vc_row row_height_percent=&#8221;50&#8243; 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