Free 3D CAD files (ER Collets)

One of the (cool) ‘delights’ of CAD is having access to the myriad of free 3D (part) files, both from manufacturers and individuals.

An albeit brief Internet scan has failed to locate what I’m looking for. Either I’m using the wrong keywords, or perhaps the files don’t exist.

I’d like to draw up (in CAD) a basic lathe mandrel featuring the `adaptation' of an ER (32) collet chuck with internal thread; it would be the type that normally screws onto the nose of a lathe mandrel.

The dimensions of the internal thread are unimportant since the thread will be ‘machined’ away (in CAD).

Can anyone please guide me to a free 3D CAD file for an ER 32 collet head/chuck/holder (with nut)?

For continuity, here's Clay's thread ...

**LINK**

Many thanks for any help.

Sam

Melbourne - Getting cooler

plenty of ER chucks on Grabcad tat can be modified to have an internal thread to suit your spindle nose, such as this

That's a great starting point Jason.

I wasn't all that clear in explaining that the holder/chuck will be bored out (from the rear) to a plain internal diameter ready for shrinking onto the partly prepared mandrel blank.

Thank for your prompt reply.

Sam

Edited By Sam Stones on 04/03/2021 21:29:18

You were clear enough, could not see anything like that but just import a file like I linked to, cut the taper off, extrude a cylinder in it's place and then extrude cut a hole and add the thread if needed.

Couple of mins spent altering the linked file to what it sounds like you want, also added a couple of spanner flats for tightening nut and removing from spindle

Hi Guys,

I seem to recall Chronos do or used to do an ER32 chuck that just screwed onto the Myford spindle nose.

Expensive though, I do recall someone describing how they made their own.

Edited By John Baron on 05/03/2021 08:50:50

Thanks for your help Jason and for your near instant rendering.

At this stage John, the mandrel will exist in CAD only. It is even becoming more appropriate to design the whole mandrel from scratch.

Thanks for your interest.

Sam

Edited By Sam Stones on 05/03/2021 22:35:25