Anybody know what these are?


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Thread: Anybody know what these are?

  1. #1
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    Default Anybody know what these are?

    I've got 3 of these in different sizes, came with some machinist tools someone I know gave me, he wasn't sure where they came from, probably his dads old stuff
    Anyway, I have no idea what they are and haven't come up with a use for them is several years so it's not something in my line and yet somehow looks familiar
    No part numbers or anything, might be "home made" but I don't see the purpose

    Here's a picture of the larger one
    Steel, doesn't seem hardened and will surface rust fairly easy
    Edges are all pretty sharp but maybe not "sharpened"
    The internal thread is tapered, the set screw stops before bottoming out and I can see the thread get shallower, might just be from a starting tap shape though
    No slits or anything so not an expanding mandrel (unless they were un-finished?) and the internal square is pointless if they were
    The set screw is short and the hex for the key goes right through
    Corners on the inside square are pretty small/sharp, not sure if it was wire-cut or broached

    Look familiar to anyone?

    Attached Thumbnails Attached Thumbnails Anybody know what these are?-img_0429-medium-jpg   Anybody know what these are?-img_0430-medium-jpg   Anybody know what these are?-img_0431-medium-jpg  


  2. #2
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    Default Re: Anybody know what these are?

    a



  3. #3
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    Default Re: Anybody know what these are?

    Set screw appears to be straight thread, goes in equally deep if flipped over, doesn't actually seem to have a top or bottom
    M



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Anybody know what these are?

Anybody know what these are?