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Thread: Depth micrometer caliper attachment

  1. #1
    Supporting Member mattthemuppet's Avatar
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    Aug 2016
    Walla Walla, WA USA
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    mattthemuppet's Tools

    Depth micrometer caliper attachment

    simple project to use my digital caliper as a depth micrometer. One day I'll get a proper metric depth micrometer, but until then this should do fine.

    Made from a perfectly sized piece of 13x100x25mm alu scrap. Drilled two holes in the side (where the rounded inside corners are) either side of where I wanted the slot to be. Drilled and tapped 2 matching holes in a piece of scrap and then screwed them together. This allowed me to hold my work in the vice but machine all 4 sides AND the slot in one set up, so that the slot was perpendicular to the base.

    Cut the faces with a 1/4in 2 flute endmill, then the slot to ~7mm deep and ~9mm wide. Followed up with a woodruff key cutter - first the thinnest one I have, then one closer to size (~3mm) - and did a few passes to get a tight sliding fit with the caliper.

    Then cut the chunks out with a hacksaw, cleaned up the sides and then angled both tops 3deg to clean them up.

    Drilled and tapped for 4-40, cut down a thumb screw I salvaged from somewhere and tarted up the edges with a file. Done!

    Depth micrometer caliper attachment-img_5320.jpgDepth micrometer caliper attachment-img_5321.jpgDepth micrometer caliper attachment-img_5322.jpg

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  2. The Following 2 Users Say Thank You to mattthemuppet For This Useful Post:

    Paul Jones (Sep 13, 2016), PJs (Sep 13, 2016)

  3. #2
    Content Editor
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    Aug 2013
    Thanked 1,851 Times in 1,652 Posts

    Thanks mattthemuppet! We've added your Depth Micrometer to our Calipers category,
    as well as to your builder page: mattthemuppet's Homemade Tools. Your receipt:

    2000 Tool Plans

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