Collet chuck

[Andy SprouleParticipant @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

[Andy SprouleParticipant @andysproule22368]

[JohnFParticipant @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

[Chris Evans 6Participant @chrisevans6]

I made a backplate for somebody a few years ago. Memory tells me 75mm. I have been known to be wrong though.

[Chris Evans 6Participant @chrisevans6]

I made a backplate for somebody a few years ago. Memory tells me 75mm. I have been known to be wrong though.

[Robert Atkinson 2Participant @robertatkinson2]

It would be useful of you at least specified the collet size. Even with this the size could vary from make to make.

[JasonBModerator @jasonb]

ER32 on a 100mm fitting.

[Andrew EntwistleParticipant @andrewentwistle]

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

[Michael GilliganParticipant @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.

[not done it yetParticipant @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.

[old martParticipant @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

[Howard LewisParticipant @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

[Andy SprouleParticipant @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

[HOWARDTParticipant @howardt]

Mine is from Arc, ER25 as per their chart, 72mm register, 84mm PCD.

[Author]

Posts