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Tongue & Groove chuck Jaws?

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  • Tongue & Groove chuck Jaws?

    With the American Lathe I picked up yesterday I got a new(has been mounted) Bison 8" 3 jaw chuck which I has looking up on ebay & ran across these #360427418215. Being new to all this I've never seen these 3 pie jaws. Are they worth buying & has anyone used them & for what purpose. Thanks again for our help. Eric
    "Let me recommend the best medicine in the
    world: a long journey, at a mild season, through a pleasant
    country, in easy stages."
    ~ James Madison

  • #2
    Since they are aluminum, I would be using these as machinable surfaces to possibly hold a larger diameter thin disc of some sort.

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    • #3
      Here are the "pie jaws" in question:

      http://www.ebay.com.au/sch/i.html?_f...All-Categories

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      • #4
        They are machinable jaws. Usually for holding large thin rings or other things you do not want to distort. Same idea as emergency collets.

        Are they worth it? That all depends on what you are doing. For somethings they are the only way to hold parts. For others.... Not really.

        Sometimes we have machined profiles into them to hold odd parts.

        I have used them over 20 some years. Guess they have their place.

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        • #5
          kinda weird, but I was just using my homemade set today for some lathe work. What huntinguy said is spot on, I dont have much to add to that

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          • #6
            Thanks for the replies. I'd never seen them. I think they'd be a good project/
            "Let me recommend the best medicine in the
            world: a long journey, at a mild season, through a pleasant
            country, in easy stages."
            ~ James Madison

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