Left Hand Thread Lathe Collets

Left Hand Thread Lathe Collets

This topic has 7 replies, 6 voices, and was last updated 9 May 2017 at 11:05 by Keith Bishop.

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31 December 2016 at 16:08 #274695
Keith Bishop
Participant
@keithbishop65663
Can anybody help me!!

I have a large number of lathe collets (109). Having checked the dimensions i believe them to be "Type 5C". However, they have a 12TPI Left Hand thread. 48 of them are metric, in a fitted wooden draw and are marked with interlocking "C"s (possibly Crawford Collets) and the numbers 9252. They range from 1 to 25mm dia in 1/2 mm steps (8.5mm is missing). My wife has done a lot of research online but cannot find anything with Left Hand Threads.

What sort of collet chuck would they fit?

Are they rare? Are they worth anything?

Any information would be appreciated

Regards

Keith
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31 December 2016 at 16:08 #24972
Keith Bishop
Participant
@keithbishop65663
31 December 2016 at 17:01 #274702
Chris Evans 6
Participant
@chrisevans6
I have a big selection of 5C collets some 70 years old (they came with my 1942 vintage South Bend lathe) and some recently purchased. Never seen any with left hand thread, new standard 5C collets can be bought for sub £6 each.
31 December 2016 at 17:05 #274703
John Reese
Participant
@johnreese12848
The 12 pitch thread is odd too. Standard 5 C's have a fine thread, 26 tpi if I remember correctly.
31 December 2016 at 17:08 #274704
Nick Hulme
Participant
@nickhulme30114
Crawford Trugrip rings a bell.
31 December 2016 at 17:10 #274705
JasonB
Moderator
@jasonb
Made to fit a Crawford Truegrip Collet chuck, would be of value to someone who has a chuck and few or no collets
8 May 2017 at 17:30 #297119
Piero Franchi
Participant
@pierofranchi37209
HI Keith

I know this is a old topic, but if you still have these collets, plz contact me

Piero
9 May 2017 at 11:05 #297274
Keith Bishop
Participant
@keithbishop65663
Hi Piero.

I have sold most of them on ebay. I only have 6 left and they are currently on ebay item no. 361973317415 if you are interested.

Regards

Keith
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