{"id":631,"date":"2012-07-02T12:47:10","date_gmt":"2012-07-02T19:47:10","guid":{"rendered":"http:\/\/implant-mechanix.com\/?p=631"},"modified":"2015-10-20T00:42:16","modified_gmt":"2015-10-20T00:42:16","slug":"miniature-turning-stainless-steel-roller","status":"publish","type":"post","link":"http:\/\/www.implant-mechanix.com\/blog\/2012\/07\/02\/miniature-turning-stainless-steel-roller\/","title":{"rendered":"Miniature turning stainless steel roller"},"content":{"rendered":"

Here is a tiny turned roller for a medical device assembly machine.
\nOnly 6 were needed, making this project unattractive for bigger vendors to tackle.<\/p>\n

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\nThe body of the roller is 4 mm diameter and precision turned on my Prodigy CNC lathe to a 16 micro-inch finish.
\nThe shafts were fitted into a precision wire EDM cut and diamond lapped bore, positioned to length using a 50:1 shadowgraph, and then swaged in place.<\/p>\n<\/div>\n<\/div>\n

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\nHere is a pivot shaft before installation; it\u2019s quite a challenge to handle, and small enough to be lost forever if it\u2019s dropped on the floor. (0.0205\u201d diameter and 0.093\u201d long)
\n2 pivot shafts, precision ground to length, and installed back-to-back, were used in each roller
\nThe shafts were sourced commercially, and run in jewel bearings with almost zero friction.
\nThe tip geometry is almost impossible to make without special equipment (0.001\u201d radius and 2 micro-inch finish).
\nIt\u2019s also very delicate, even though the pivots are hardened, so sliding commercially available pivots into a machined hub and then swaging them in, became the process of choice to avoid damaging the tips during installation.
\nAttempts to press them into an undersized bore were unsuccessful.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Here is a tiny turned roller for a medical device assembly machine. Only 6 were needed, making this project unattractive for bigger vendors to tackle. The body of the roller is 4 mm diameter and precision turned on my Prodigy CNC lathe to a 16 micro-inch finish. The shafts were fitted into a precision wire […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-631","post","type-post","status-publish","format-standard","hentry","category-miniature-turning"],"_links":{"self":[{"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/posts\/631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/comments?post=631"}],"version-history":[{"count":1,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/posts\/631\/revisions"}],"predecessor-version":[{"id":823,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/posts\/631\/revisions\/823"}],"wp:attachment":[{"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/media?parent=631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/categories?post=631"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.implant-mechanix.com\/blog\/wp-json\/wp\/v2\/tags?post=631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}