Collet chuck

This topic has 13 replies, 11 voices, and was last updated 17 December 2020 at 19:55 by HOWARDT.

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13 December 2020 at 17:01 #513277
Andy Sproule
Participant
@andysproule22368
Hi has anyone bought one of these and could tell this diameter marked on pic.Tried seller but no luck.

Edited By JasonB on 13/12/2020 17:20:15
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13 December 2020 at 17:01 #27822
Andy Sproule
Participant
@andysproule22368
13 December 2020 at 17:10 #513279
JohnF
Participant
@johnf59703
Anybodies guess ! but less than 4.0" ?? however for the sake of £12 why not buy one from Arc ? You will then know the product and have recourse if there is a problem

John
13 December 2020 at 17:26 #513281
Chris Evans 6
Participant
@chrisevans6
I made a backplate for somebody a few years ago. Memory tells me 75mm. I have been known to be wrong though.
13 December 2020 at 17:26 #513282
Chris Evans 6
Participant
@chrisevans6
I made a backplate for somebody a few years ago. Memory tells me 75mm. I have been known to be wrong though.
13 December 2020 at 17:26 #513283
Robert Atkinson 2
Participant
@robertatkinson2
It would be useful of you at least specified the collet size. Even with this the size could vary from make to make.
13 December 2020 at 17:34 #513287
JasonB
Moderator
@jasonb
ER32 on a 100mm fitting.
13 December 2020 at 18:00 #513289
Andrew Entwistle
Participant
@andrewentwistle
Based on pixel measurements from 100mm OD can't be far off 73mm.
13 December 2020 at 18:06 #513290
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Andrew Entwistle on 13/12/2020 18:00:33:

Based on pixel measurements from 100mm OD can't be far off 73mm.

.

Could be 2 & 7/8 inches then

MichaelG.
13 December 2020 at 18:18 #513292
not done it yet
Participant
@notdoneityet
I would think a basic caliper would be the tool to pick up and use? Even s good tape measure might be close enough? Whatever it is, it may well need a backplate making to fit it quite closely. That would/should be done by careful test fitting until the spigot is just the right size.
13 December 2020 at 18:59 #513305
old mart
Participant
@oldmart
I have an er25 version on a backplate, of course, the register is loose for fine adjustment, after all, if the register is tight, you have to put up with whatever runout each collet gives.

You can buy them with a choice of 80, or 100mm outside diameters.

Edited By old mart on 13/12/2020 19:08:12
14 December 2020 at 15:19 #513449
Howard Lewis
Participant
@howardlewis46836
I have both ER25 and ER32 models.

I had to make backplates to fit to my lathe. They have the advantage of allowing long material to feed through, unlike the Morse taper type ,chucks (which are more suited to holding cutters in a Mill, in my view ).

Howard
17 December 2020 at 19:36 #514060
Andy Sproule
Participant
@andysproule22368
Hi folks thank you for replies.I should have said it was er32 and the od was 100mm.

Edited By Andy Sproule on 17/12/2020 19:41:27
17 December 2020 at 19:55 #514063
HOWARDT
Participant
@howardt
Mine is from Arc, ER25 as per their chart, 72mm register, 84mm PCD.
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