Need To Id A Collet That I Want To Give Away.

[spitfire]

I am trying to ID a nice collet that needs to find a new free home.
My basic description is that it looks exactly like the standard 3C collet, just a bit larger in body diameter and a bit shorter.

Basic dimensions are; body dia.- 0.686", O.L. total - 2.374", dia. of tapered head, free state - 0.950", approx. length of taper -1/2", thread dia -0.635" x 26 tpi, with a 0.125" nominal index slot.

Collet size 5/16", mfg by "Porst Bros, Chicago".

Again think short stubby 3C collet. Condition very good, free for the USPS snail mail postage.

Karl J. Schmitt (636)797-4203

 

[kd4gij]

Sounds like you have a 3AT collet there. http://www.loganact.com/tips/collet.htm

 

[spitfire]

Sounds like you have a 3AT collet there. http://www.loganact.com/tips/collet.htm

Thank you, you are a great source of information. Yes, the dimensions and sketch match which suggests that it is a 3AT (Logan) collet.

Now, who should like to have it for only the cost of postage, USPS snail mail. A pre-paid mailer will cost some two to four bucks and will ship most any place, USA. Reply with your address or call me at (636)797-4203, and be sure to slowly repeat you phone as I have lost most of my ability to hear.

Now here is another challenge for you. Many years ago (mid fifties) I inherited a beautiful set of collets along with an unusual chuck, which permitted the removal of the work piece while the spindle was turning. It was basically a “production tool” as you did not have to de-clutch the spindle to exchange the work piece.
Best as I can read the German scrip the brand name is “Oitlieb” or perhaps “Gitlieb” and my set ranges from 1/16” to ¾” diameter range. Some basic measurements are; body dia, back section, 29mm (1.100”); O.A.L. 70mm (2.765”); OD taper, relaxed, 38-39mm (1.523”); stepped head dia 29mm (1.14”). I would describe it as a short stubby spring steel collet of excellent quality.
The chuck was attached to the spindle nose via a custom made threaded adapter and dead headed to the head stock casting so that it did not turn. A lever was employed to engage the rotating spindle via an internal bearing / clutch, which permitted turning of the work piece.
No, even in my most advancing years, this collet / chuck set is not for sale. I do use it on occasion and there are many memories attached to it.

Thank you and I am looking forward to your reply.

Karl J. Schmitt “Spitfire”

 

[rcflier]

Hi.

That would be "Ortlieb". And I don't think you're supposed to use it while it's turning.

Cheers
Erik