Chester has some heavy metal, and I don't mean some 80's boy band...

But no lathe ER collet chucks that I could see.

Louis Ohland wrote:
Warco carries ER25 and ER30 lathe collet chucks. No ER40 that I saw.

Louis Ohland wrote:
Warco (www.warco.co.uk)
Chester Machine Tools (www.chesteruk.net)
Machine Mart (www.machinemart.co.uk)

Mike wrote:
On Sat, 15 Dec 2007 22:20:31 -0600, Louis Ohland
wrote:

The CQ6128A lathe has an MT4 spindle bore and a 1.5x8 threaded nose.
The inner diameter of the bore is 26mm. I'd like to use ER40 collets
with this if possible, where I can pass stock into the bore. Yes, I
have seen the MT4 ER40 chucks on ebuy.

5C are 1.25 (or bigger) at the base. 3C collets go to 3/4, but they
use a drawbar. 5C collet chucks only add about an eighth inch over
ER40, so there's no extra cache to them...

Ace Eurotrade makes an ER32 collet chuck, but no ER40.

What exactly are you intending to clean up?
The MT4 taper is nothing like that on an ER40 collet. The closing nut
thread is nowhere near your spindle nose thread either.

Why can't you just machine the ER collet holder with your lathe from a
suitable hunk of steel? No need for a reamer just use the compound
slide and a sharp tool.

I think another UK supplier do ER40 backplates, maybe Warco or
Rotagrip.