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world famous bobski mystery thing, pic #138

Comments

9 comments

  • goldeneagle76
    Something you can poke into wood/drywall then rotate and make a circle pattern.
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  • ripley16
    Does the tip on the right pivot?
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  • Tailgunner1954
    It's a old style 10th's (1 tenth of a thousanth or 100 millionths) indicator, the numbers on the flat end are .0001" movement of the end with the hole in it. The nut/stud are used to mount it.
    AKA a "last word" indicator. BTW, I still have one or 2 of those, but now I use my Interapid .0005 and .0001 dial indicators.

    It's a machinests tool, put it with your dad's lathe stuff
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  • bobski
    yes, tip pivots.

    where does it mount with the lathe?
    why the hole on the tip? is something missing?
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  • cmd66
    Old style indicator, used for tooling and such.
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  • bobski
    is it complete?
    age?
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  • Tailgunner1954
    Complete, yes
    Age,??? they made em like that from the teens right up into the 60's, so it's hard to say the exact age.
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  • bobski
    why the hole in the tip?
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  • Tailgunner1954
    No good answer for you there Bob, but as it's not threaded (at least mine arn't) for a contact pin, my best guess is weight reduction. It could also allow it to measure a pulling motion with some type of linkage (wire or string?). Normaly you run the side of the round end aganst the part your checking for true (IE while setting up a 4 jaw lathe chuck), or mount it on a surface gauge to check for parallel surfaces.
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