ER32 Myford Collet Chuck

Hi all I have now tried three 32mm collet chucks but none of them have fit my myford spindle at all

Geoff

I understand it may not suit everyone but making your own ER32 chuck isnt that hard IMHO and if made on the machine it is to be used on you are assured of the best concentricity.

I'm sure John Stevenson (Sir John) posted a diagram on here somewhere if you wanted to go that route.

Regards

Paul

Geoff

In what way don't they fit your spindle? If they are designed for the Myford spindle nose then they should fit. As I posted above though when I first got my ER25 chuck I couldn't get it to fit and was sure that it must be faulty! The fit of this chuck is very close and must be offered up precisely to get it onto the spindle. Have you tried the technique I mentioned to align the chuck by means of a rod held in the tailstock chuck?

Norman

I bought a Myford ER32 set from Glostertools, not very impressed with the TIR to be honest. I recently got a couple of ball-bearing closing nuts and meant to test it again but so far haven't bothered. I have an R8 ER32 chuck from RDG and the collets seem to be fine used in that so I suspect it is the chuck at fault. It doesn't appear to be well hardened anyway. My new 6-jaw is more accurate than the collet set.

Nigel & Geoff,

There is some useful discussion about the Myford register diameter, on an earlier thread.

I think it worth checking what [very slight] taper exists on your register.

MichaelG.

Hi all thanks for your comments and I have not tried your method norman but I did previously read about it although I cannot see the chuck fitting as it is so tight on the spinle nose thread at the start of the thread

Geoff

Hi

I purchased the ER 32 collet chuck fro Myford.co.uk.

The collets are from Rego-Fix.

But the fit, or missing fit, on the register, makes it almost useless.

The runout are around 30 my. And it is very depent of the torque when you screw it on the spindle.

The runout on the spindle itself, is around 5 my.

I think it is better to make my own, as descibed in several articles.

DON't buy it!!!

John, just to say I had a similar experience when I standardised on ER32 for lathe, mill and Quorn. works very well for me.

I bought one of the one piece units that screw directly on rather than having sort of back plate fitting. My conclusion was that they hadn't aligned the register to the collet taper so the run out was pretty bad. Hard to be entirely sure why but the thread being of centre wouldn't help.

I do know from a long time ago that suppliers were having problems with that type and hoped that they had sorted them out.

The actual collet holder on the 2 piece ones are available from several sources including Arc. I wanted mine for milling on a DW.

John

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It seems that the part that screws on the nose, are fitting badly (sloppy) on the register.

It feels more sloppy than any of my 3 chucks.

And can be veryfied with marking blue.