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Caliper Out of Adjustment

Discussion in 'Off Topic Threads' started by RickN, Dec 31, 2011.

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  1. RickN

    RickN Well-Known Member

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  2. rocketman100

    rocketman100 TS Member

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    Look for a chip of something in the rack teeth. Such will cause the gear to skip a tooth. If you can remove the chip (magnifying glass and tweezers) or determine the rack is clear, don't worry about the position of the hand, just rotate the dial to read zero when the jaws are fully closed.

    You can very gently lift the gear out of the rack, move the slide one tooth, and re-engage the gear. Usually not worth the trouble.

    DDA
     
  3. Tron

    Tron Supporting Vendor Supporting Vendor

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    I would highly suggest tossing it. The Lyman digital ones are actually pretty damn good these days and don't cost very much.

    Jb
     
  4. Brian in Oregon

    Brian in Oregon Well-Known Member

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    Just rotate the dial to the new zero position.
     
  5. Haskins Bill

    Haskins Bill TS Member

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    Don't know anything about the Lyman but the Mitutoyo ones came with a 'tool' that was no more than a piece of about .003 shim stock cut narrow enough for about an inch that was used to push in along the rack so that the 'gear' that drives the gear that in turns moves the needle. Well that gear rides up on the shim and then you can make it skip a tooth or however many it takes. Like I said I do not know if this applys to Lyman's. You can bet that Lyman did not actually make it. oh by the way the advice to look over the rack first with a magnifying glass still applys along with using tweezers to clear out any debris. Bill
     
  6. Gary Waalkes

    Gary Waalkes Well-Known Member

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    sometimes you actually have to buy something new.
     
  7. HSLDS

    HSLDS Well-Known Member

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    Lots of them have a small hole where you can insert a pin (think paper clip) to raise the spring off of the drive gears - this lets you move the jaws without the dial moving. You can 're-zero'; to a point, then just reset the zero by rotating the dial for the final bit.
     
  8. John Thompson

    John Thompson TS Member

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    You can buy a new digital caliper for under $15.00. It is probably as or more accurate than what you have. You can re-zero it, read in english or metrics, they are the way to go.
     
  9. 221

    221 Banned User Banned TS Supporters

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    Once they start to jump teeth, pitch em....ya cannot trust them after they do...buy an electric caliper and be done with it. About all a dial caliper is good for, is a layout scribe.
     
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