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  • Yet another whatsit

    I found the item below among some things in some used Kennedy toolboxes I recently bought.

    Don't know what it is.

    It's not easy to see in the pics (cell phone camera), but the springy ends that come together are threaded with what looks like a left-hand 6-32 (or there abouts).

    There are no markings at all.

    Anybody know?




  • #2
    It's part of a drafting pencil. The ends are polished and have a trough to hold a lead. The LH thread allows a shaft to be turned in a natural way to draw this piece into the body of the pencil. As it is drawn tight it will grip the lead. That one is ginormous, so perhaps it's part of a trammel, not a pencil?

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    • #3
      Name another Machinist forum that could ID that in 15 min flat!

      Comment


      • #4
        There is another machinist forum?

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        • #5
          It could also be jaws from a pin vise. Looks kind of big for a pencil.
          Kansas City area

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          • #6
            It looks like the jaws from a brace. As in a "Brace and bit" old woodworker tool.
            ...lew...

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            • #7
              I think Tony is heading in the right direction, but in drafting, it's called a "Beam Compass" instead of trammel points.
              Definition: Racecar - a device that turns money into noise.

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              • #8
                This is the guts of a hand tap holder. The jaws fit in the tapered bore of a knurled nut. As the nut is tightened, the jaws close.
                For just a little more, you can do it yourself!

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                • #9
                  Retractor off an endoscope?
                  Mark

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                  • #10
                    My first thoughts were "Roach Clip"!!!!
                    Brian Rupnow

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                    • #11
                      Tonsil extractor?
                      I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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                      • #12
                        Here's a cheaper version:

                        Last edited by ed_h; 05-29-2013, 09:28 PM.
                        For just a little more, you can do it yourself!

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                        • #13
                          If you look at the tap holder, or a bit brace, the jaws are different, not round, not serrated.

                          Drafting pencil? maybe, it looks a bit large for that. The construction is a bit more complex and "fine" in a way than for many tools, so.... but it is indeed a sort of "collet" intended to hold something, presumably something either threaded or softish or the "threads" would do no good.
                          1601

                          Keep eye on ball.
                          Hashim Khan

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                          • #14
                            I was looking for 6-32 external threads, until I finally saw the internal threads on the gripping surfaces. A pencil lead would shatter if you tried to grip it with threads. And why would they need to be LH just to grip something?

                            [edit] and yes, I couldn't understand how external threads on this puzzler could be as small as 6-32.
                            Last edited by aostling; 05-30-2013, 07:00 AM.
                            Allan Ostling

                            Phoenix, Arizona

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                            • #15
                              Originally posted by boslab View Post
                              Retractor off an endoscope?
                              Mark
                              In which case, I wouldn't recommend it as a roach clip!

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