{"id":159,"date":"2011-09-15T21:31:51","date_gmt":"2011-09-15T20:31:51","guid":{"rendered":"http:\/\/www.hilltop-cottage.info\/blogs\/adam\/?p=159"},"modified":"2011-09-15T21:31:51","modified_gmt":"2011-09-15T20:31:51","slug":"model-engineers-depth-gauge","status":"publish","type":"post","link":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/model-engineers-depth-gauge\/","title":{"rendered":"Model Engineers Depth Gauge"},"content":{"rendered":"

\"\"<\/a>Having recently faced some cylinder drilling, I finally got around to making a depth gauge. It took about a morning. The sizing is very-much determined by available parts, starting from the springs and having some 3\/8″ OD brass tube with nice thick walls (ID approx 1\/4″) to hand. Two springs gave me about the 1 1\/2″ of gauge travel I wanted.<\/p>\n

No dimensioned drawings this time, but see below for a photograph of the disassembled gauge from which you should be able to work it out. In lieu of drawings, here are a few notes…<\/p>\n

    \n
  1. The end cap was made first, drilled to about 1\/64″ less than the OD of the brass tube. You can see where I then turned down the tube to get a nice press fit. I’m very fond of press fits: most satisfying and clean. If you over-do it then you can always braze\/solder but it never looks so nice. I have a small arbor press.<\/li>\n
  2. The other end of the tube was threaded using ME 3\/8″ x 32 TPI since this matches the tube OD and is a fairly fine thread.\"\"<\/a><\/li>\n
  3. The 1\/4″ spring-stopper on the 1\/16″ central “spike” was another press fit thanks to some metal forming as I parted it off. Don’t bend the spike!<\/li>\n
  4. The thumb screw was made by tapping (5BA) a shaped and parted-off piece of hex stock, screwing a 5BA cheese-head screw firmly into place with a bit of thread-lock and then turning away most of the head. NB: face, chamfer, drill, tap, insert screw and turn-off head are all done without removing the work from the chuck.<\/li>\n<\/ol>\n

    The images above are links to larger photographs.<\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    Having recently faced some cylinder drilling, I finally got around to making a depth gauge. It took about a morning….<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,13],"tags":[],"class_list":["post-159","post","type-post","status-publish","format-standard","hentry","category-model-engineering","category-workshop-tools","post-archive"],"_links":{"self":[{"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/posts\/159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/comments?post=159"}],"version-history":[{"count":3,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/posts\/159\/revisions"}],"predecessor-version":[{"id":164,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/posts\/159\/revisions\/164"}],"wp:attachment":[{"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/media?parent=159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/categories?post=159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hilltop-cottage.info\/blogs\/adam\/wp-json\/wp\/v2\/tags?post=159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}