{"id":6631,"date":"2026-02-06T12:22:11","date_gmt":"2026-02-06T11:22:11","guid":{"rendered":"https:\/\/kammerer-gewinde.zold.at\/lexicon\/deep-hole-bore\/"},"modified":"2026-04-14T17:22:27","modified_gmt":"2026-04-14T15:22:27","slug":"deep-hole-bore","status":"publish","type":"lexicon","link":"https:\/\/kammerer-gewinde.zold.at\/en\/lexicon\/deep-hole-bore\/","title":{"rendered":"Deep-hole Bore"},"content":{"rendered":"\n<p>A deep-hole borehole is a bore whose depth is significantly greater than its diameter \u2013 typically with a depth-to-diameter ratio of around 5:1 or more. Such bores are often machined axially into spindles, shafts or nuts, for example to allow lubricant supply, to reduce weight or for technical performance reasons. <\/p>\n\n<h2 class=\"wp-block-heading\">Meaning<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Weight and mass inertia of components:<\/strong> longer shafts are lighter<\/li>\n\n\n\n<li><strong>Bending and buckling stiffness:<\/strong> oversized bores can reduce stability<\/li>\n\n\n\n<li><strong>Lubrication:<\/strong> central bores allow for targeted lubrication along the spindle<\/li>\n\n\n\n<li><strong>Integration of media or conduits:<\/strong> oil, coolant, compressed air, or sensor lines<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Technical aspects<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Deep-hole drilling is usually carried out using specialised tools such as deep-hole drilling bars, BTA or ejector drilling methods.<\/li>\n\n\n\n<li>The quality of the borehole is critical: roundness, surface roughness and straightness affect performance and wear.<\/li>\n\n\n\n<li>The diameter and position must be selected in such a way that the strength and stiffness of the spindle are not unduly reduced.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Practical relevance<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>This is particularly important for long spindles in CNC machines or ball screws, where weight reduction and lubrication are crucial.<\/li>\n\n\n\n<li>Also used in medical technology, hydraulic systems and toolmaking for precise axial channels.<\/li>\n\n\n\n<li>Basis for dimensional calculations, buckling force and service life of the spindle.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A deep-hole borehole is a bore whose depth is significantly greater than its diameter \u2013 typically with a depth-to-diameter ratio of around 5:1 or more. Such bores are often machined axially into spindles, shafts or nuts, for example to allow lubricant supply, to reduce weight or for technical performance reasons. Meaning Technical aspects Practical relevance<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"lexiconkategorie":[],"class_list":["post-6631","lexicon","type-lexicon","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexicon\/6631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexicon"}],"about":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/types\/lexicon"}],"wp:attachment":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/media?parent=6631"}],"wp:term":[{"taxonomy":"lexiconkategorie","embeddable":true,"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexiconkategorie?post=6631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}