Table mounted collet chuck.

[dvbydt]

When I ordered an MT3 ER32 collet chuck from CTC I also got a 20mm plain shank one like this :-

Table mounted collet chuck.

The shank was removed with a cut off disk in an angle grinder, leaving this :-

Table mounted collet chuck.

Next the outer body was turned and drilled. Originally I intended to shrink fit it to the chuck, but it seemed a shame to
ruin the finish, so I uused JB Weld and two grub screws.

Table mounted collet chuck.

The cut off shank was mounted in the 4 jaw and trued up. Using a 20mm collet in the assembly, it was faced
and bored out to 16mm.

Table mounted collet chuck.

One of these :-

Table mounted collet chuck.

was turned into a 16mm spigot for the rotary table.

Table mounted collet chuck.

So, I can now mount chuck on the table,

Table mounted collet chuck.

or on the rotary table.

Table mounted collet chuck.

That will hold from 2mm to 20mm dia.

Thats all my modding for Today's post!


Ian

[Bernd]

Very nice Modding Ian. 

Bernd

[Stilldrillin]

That's cute, Ian!  

A handy little weapon. Well done!  

David D

[sbwhart]

Now thats a neat idea far better than my method of doing the same thing.

Thanks for showing.

Stew

[raynerd]

That is a really smart idea!

Chris

[Pete.]

Nice job Ian. I like te dividing-head centering stub.

[Davo J]

Nice job,
Just a suggestion
If you open it up to 20mm all the way through, the maximum size for the ER32(20mm) stock could go right to the bottom. It would mean making a new 20mm spigot though.

Dave

[dvbydt]

Thanks for your interest guys.
Dave, yes I did go through that idea but the soft end arbor was not big enough where I needed it. So, I decided that I would just use a table mounted 3 or 4 jaw chuck when necessary.
The concentricity errors build up so that it is about 0.10mm (0.004")  TIR, but this can be reduced to 0.03mm (0.001") with a tap from a soft hammer.

Ian

[Davo J]

If you ever have a need to use the full depth, you could shrink fit a larger piece into you arbour.
Nice work with what you have done though.

Dave

[dvbydt]

Yes Dave, I may do that. It has the advantage of being able to finish machine the spigot diameter on the mill, so getting it more concentric.

Ian