Clarke Precision Chuck

[Bob SillitoeParticipant @bobsillitoe83708]

[Bob SillitoeParticipant @bobsillitoe83708]

I have recently found this chuck. The box is labelled Clarke Precision Chuck. It comes with 3 collets which screw into the nut and the arbor is 0.75in diameter. It might be useful but I don't know what for! I wonder if it would be used on a lathe or milling machine and I am a bit surprised that it doesn't have a taper of some sort on the arbor. Anyone seen one before?

Thanks

Bob

[bernard towersParticipant @bernardtowers37738]

I presume you mean CLARE, if so quite well known. Google is your friend.

Edited By bernard towers on 02/07/2023 12:07:56

[Tony Pratt 1Participant @tonypratt1]

Never seen the like but I have heard of Clare collets with Morse taper arbors.

Tony

[Bob SillitoeParticipant @bobsillitoe83708]

Well spotted it is Clare. My mothers maiden name was Clarke so I just read it as that!

[BazParticipant @baz89810]

Posted by Bob Sillitoe on 02/07/2023 11:58:46:

I have recently found this chuck. The box is labelled Clarke Precision Chuck. It comes with 3 collets which screw into the nut and the arbor is 0.75in diameter. It might be useful but I don't know what for! I wonder if it would be used on a lathe or milling machine and I am a bit surprised that it doesn't have a taper of some sort on the arbor. Anyone seen one before?

ThanksBob

Why should it have a taper? A lot of these holders were used on capstan lathes where the turret tooling was made to take parallel shanks, one inch diameter being very common but also 3/4 and of course 5/8 which is used by Myfords for their capstan turret.

[Bob SillitoeParticipant @bobsillitoe83708]

I have been doing a bit more digging. Here is an advert for a similar collet holder. This one does have a tapered arbor, morse or otherwise. It also needs special end mills with a latch on the end. I guess it was a rival to the Clarkson Autocollet.

and here is a picture of the factory where they were made,, sadly some years after it closed

I have concluded that the holder is no use to me. I don't have a machine that it would fit and I don't have any of the special endmills, so it doesn't have much going for it! If it was of any use to anyone please send me a message and we can see if we can sort something out.

Bob

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