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jmarkwolf
05-29-2013, 07:33 AM
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?

http://i1356.photobucket.com/albums/q730/jmarkwolf/Whatsit_1_zps577188eb.jpg (http://s1356.photobucket.com/user/jmarkwolf/media/Whatsit_1_zps577188eb.jpg.html)

http://i1356.photobucket.com/albums/q730/jmarkwolf/Whatsit_2_zps1356d6f3.jpg (http://s1356.photobucket.com/user/jmarkwolf/media/Whatsit_2_zps1356d6f3.jpg.html)

Tony Ennis
05-29-2013, 07:48 AM
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?

flylo
05-29-2013, 08:00 AM
Name another Machinist forum that could ID that in 15 min flat!

BigMike782
05-29-2013, 08:28 AM
There is another machinist forum?:D

Toolguy
05-29-2013, 09:28 AM
It could also be jaws from a pin vise. Looks kind of big for a pencil.

Lew Hartswick
05-29-2013, 09:34 AM
It looks like the jaws from a brace. As in a "Brace and bit" old woodworker tool.
...lew...

browne92
05-29-2013, 09:42 AM
I think Tony is heading in the right direction, but in drafting, it's called a "Beam Compass" instead of trammel points.

ed_h
05-29-2013, 10:05 AM
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.

boslab
05-29-2013, 06:08 PM
Retractor off an endoscope?
Mark

brian Rupnow
05-29-2013, 06:51 PM
My first thoughts were "Roach Clip"!!!!

darryl
05-29-2013, 09:18 PM
Tonsil extractor?

ed_h
05-29-2013, 09:19 PM
Here's a cheaper version:

http://bullfire.net/Temp/SDC11877a.JPG

J Tiers
05-29-2013, 09:59 PM
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.

aostling
05-29-2013, 11:26 PM
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.

jmarkwolf
05-30-2013, 08:16 AM
Retractor off an endoscope?
Mark

In which case, I wouldn't recommend it as a roach clip! :)

JAY BIRD VII
05-30-2013, 10:56 AM
I'm with Toolguy here, Looks like part of a Pin Vice to me.
The 6-32(?) Threads look RH to me and I don't know that they're original to the piece.
Somebody probably misused it to remove a hard screw, is my guess.

Cheers, Jay

P.S. Have you ever seen little bits of odds and ends in a tool box that might be saved for some future need/use that might come up during the next thousand years? :confused:

jmarkwolf
05-30-2013, 01:44 PM
I'm with Toolguy here, Looks like part of a Pin Vice to me.
The 6-32(?) Threads look RH to me

Cheers, Jay

P.S. Have you ever seen little bits of odds and ends in a tool box that might be saved for some future need/use that might come up during the next thousand years? :confused:

They're definately LH thread, but only close to 6-32 (don't have a LH thread guage).

P.S. I still have everything I've ever owned :), so yes I know what you're saying!

Alistair Hosie
05-30-2013, 03:31 PM
It's designed for tongue surgery holds the tongue down while you remove hoses teeth etc.LOL Alistair