Free 173 Best Homemade Tools eBook:  
Results 1 to 3 of 3

Thread: Hole diameter gage

  1. #1
    Supporting Member mklotz's Avatar
    Join Date
    Aug 2015
    LA, CA, USA
    Thanked 3,793 Times in 1,287 Posts

    mklotz's Tools

    Hole diameter gage

    Before I broke down and bought a set of pin gages, I made this tool for measuring the diameter of holes too small for split-ball gages.

    It consists of two parts: a housing with a lock screw and a tapered measuring gage with a cut away section that, in concert with the lock screw, prevents the measuring rod from falling out and damaging the slightly fragile tapered rod.

    In use, the tool is calibrated by sliding the taper into a hole of known diameter and measuring the projection of the rod from the top of the body. With this reference point it's then just a simple bit of math to obtain the diameter of an unknown hole.

    Yes, I knew full well when I made it that it could be fooled by a bell-mouthed hole. It was only used for non-critical measurements. I knew that I would eventually buy pin gages and I did.
    Last edited by mklotz; 07-05-2017 at 03:25 PM.
    Regards, Marv

    Home Shop Freeware

  2. The Following 4 Users Say Thank You to mklotz For This Useful Post:

    Jon (08-29-2015), kbalch (08-31-2015), Paul Jones (08-29-2015), PJs (08-31-2015)

  3. #2
    Supporting Member Christophe Mineau's Avatar
    Join Date
    Jul 2014
    France, Brittany !
    Thanked 1,156 Times in 399 Posts

    Christophe Mineau's Tools
    Great idea !
    Thanks for sharing !
    Cheers !
    Visit my Website :
    Facebook : La Belle Note
    All my personal works, unless explicitly specified, are released under
    Creative Commons BY-NC-SA license.

  4. #3
    kbalch's Avatar
    Join Date
    Jun 2012
    Clermont, FL
    Thanked 516 Times in 375 Posts
    Thanks mklotz! I've added your Hole Diameter Gauge to our Measuring and Marking category, as well as to your builder page: mklotz's Homemade Tools. Your receipt:

    Post your reply!
    Join 41,949 of us and get our 173 Must Read Homemade Tools eBook free.

    173 Must Read Homemade Tools

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts