I bought a “Unibit” type of tapered drill bit from China, a large one. It cuts up to 36mm but the shank is 1\/2 inch or 13 mm. I want to put it in a 1\/4 inch or 6.5mm chuck. The only drill I have with a half inch chuck is a big hammer drill. So I decided to see if I could spin the bit in the hammer drill and file down the shank. I tried a file, but it just polished the hardened shank. Same thing happened with a hacksaw blade. So I got a fine grit diamond coated file, and that started to cut into the shank, but I didn’t see any metal shavings coming off, so I gave up.<\/p>\n
I think the shank is too hard to do it with the tools I have. The shank needs to be in a lathe, and ground down with a grinding wheel. I need to find someone who has a lathe and can do it for me. It’s tough getting things to work like you want.<\/p>\n","protected":false},"excerpt":{"rendered":"
I bought a “Unibit” type of tapered drill bit from China, a large one. It cuts up to 36mm but the shank is 1\/2 inch or 13 mm. I want to put it in a 1\/4 inch or 6.5mm chuck. The only drill I have with a half inch chuck is a big hammer drill. <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12093","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12093"}],"version-history":[{"count":5,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12093\/revisions"}],"predecessor-version":[{"id":12110,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12093\/revisions\/12110"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}