WHAT TYPE OF COLLET IS THIS

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GRAYHIL

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Hi All
I have a collet set from 5/16 to 1 1/2 inches in 1/16 increments and am having difficulties identifying the type of collet
it is. (IT IS VERY OLD)
Anyone have an idea?
Graham
 

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GRAYHIL

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Hi Craig
They are too small, the end thread is 1.75 inches diam. x 12 tpi for closing the collet.
Thanks for trying.
Graham
 

BaronJ

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Hi Graham,

Your collet picture is far too small to show any detail !
Blowing it up simply fogs it out of focus. Try a jpg and put it in the middle of the page.
 

GRAYHIL

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Thanks Dave
But what make of screw machine, and are they still made.
Graham
 

dieselpilot

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That's an odd one for sure. Hardinge doesn't list anything like it in their catalogs and they cover virtually everything. It's an odd body diameter and short.

It may help to know where you are and which lathe this was on.
 

GRAYHIL

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Hi All
It came in a home made box from a pile of junk in an old shed and was free.
I do not know what machine it was originally from.
I made an adaptor and fitted it to my Colchester Master lathe.
I come from GB.
Graham
 

SmithDoor

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It was used on screw machines
It looks like Trub 42 but most screw machines use a push collect

Dave

Hi All
It came in a home made box from a pile of junk in an old shed and was free.
I do not know what machine it was originally from.
I made an adaptor and fitted it to my Colchester Master lathe.
I come from GB.
Graham
 

methuselah1

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D&J Collets Ltd are essentially what Crawford Collets left out of their collet range when they decided to relocate and specialise. They will make any collet you ask for, and if you elaborate on the cone angle, they will give an identification; if they sense an impending sale, this may well be given FOC, too.

-Andrew, UK
 

comstock-friend

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A look at Machinery's Handbook shows that this is a rare bird. There are no 1.75" OD bodied collets listed and those approximately that diameter are 3-1/2 to 5 inches long, not your stubby 2 inches.

John
 

SmithDoor

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Hi All
I have a collet set from 5/16 to 1 1/2 inches in 1/16 increments and am having difficulties identifying the type of collet
it is. (IT IS VERY OLD)
Anyone have an idea?
Graham
It not a cheap collet
I do have any as sold with screw machine . The set I had was up to 42mm.

Dave
 

GRAYHIL

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Hi All
Thanks for all your replies.
I will try making some split collets to fit into them for smaller work.
Graham
 

GRAYHIL

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Comstock
They are 2.812" long O/A not 2"
Blame my attempt at drawing them!!!
Graham
 

SmithDoor

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I hope this helps it is a list of dimensions of collets.
The chart is very good for pull type collects.
The collet in the drawing is post type.
Brown & Sharp and Traub used push type collet

Dave

D
traub-collets-639840.jpg
sd28844-brown-sharpe-710-1012-111-no11-3-16-round-spring-collet-2.jpeg.jpg
 
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