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Mitutoyo 101 adjustment?

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  • Mitutoyo 101 adjustment?

    I have a Mitutoyo 101 dial caliper and the zero position has moved to the 9 o'clock position. Anyone know how to get it back to the 12 o'clock position? Still usable but a pita.

  • #2
    Pop the bezel off and then gently pull the hand off the stem and re-install in the correct position.I have a set of pullers I made to work on gauges with,might be able to find a set at a jeweler who handles watch repair.

    More importantly the first thing to do is find out why it jumped.
    I just need one more tool,just one!


    • #3
      On the one Mitutoyo I have, you remove the piece that locks the bezel. Under it is a small slot that you can gently push a piece of stiff wire into. This pushes the gear away from the rack and lets you zero the needle.


      • #4
        There is a small thin shim that is included in most expensive dial calipers that is inserted between the gear and the rack and then the jaw is moved to closed and the shim removed. It is time consuming and very hard to get it at exactly the 12 O'clock position.

        Good Luck.
        It's only ink and paper


        • #5
          Thanks for all the advice. I actually found the instructions but do not have the tool, bought it used and love it. Started out using shim stock, very hard to hold. Got a call from Mark Hockett who said hammer a paper clip flat and use as the tool. Worked like a charm, it took about 5 or 6 tries to get it back to the 12 o'clock position. As far as the reason it jumped I was working with brass and I think a piece got on the rack.


          • #6
            For those not familiar with Mitutoyo dial calipers there is a tool that can be inserted in a small slot in the back of the dial to reset the needle position. The tool is .040" x .058" x 1.45" long with a loop bent on one end.
            Here are pictures,

            Yea I know my calibration test is a little past due but I never use these as I have cheap ones all over the shop. It's not as painful when a cheap set gets dropped or falls off the bench.
            Mark Hockett


            • #7

              This is the USA knock off of the origional Mark Hockett has shown. Notice that it is chromed, has a more compelling shape and blends better with the tool than the factory one. My plan is to manufacture them in bulk, make millions and retire (again) on a South Sea island. Place your order soon.
              Last edited by gr8life; 04-17-2009, 11:30 PM.


              • #8
                Would anyone know how that's done on a B&S dial caliper? Mine is at zero at 10:00 o`clock. Doesn't hurt anything, but it would be interesting to know.