QMT High Precision Adjustable ER-40 ER Collet Chucks and 5C chucks in D1-4 and D1-5

[Jason812]

This is a simple question that I can't seem to see an answer for anywhere I've looked. And not currently having, nor have I ever used, said collet chuck and collets I ask the following:

I suspect that like the ER40 chuck that PM offers (which I own), the 5C chuck can pass a long rod through the headstock? And that would hold true up to the max collet diameter of 1 1/8"?

Maritool has a 1-3/16" ER40 collet. I haven't found a larger one nor do I have it... yet.

 

[blaser.306]

I just ordered one of the PM ER-40 D1-4 collet chucks, replacing the HHIP version that was not ground properly. I wanted to know if anyone that has one could give me an od measurement of the body where the Tommy bar holes are and the diameter of those holes so I can make my wrench in advance of it's arrival.

 

[Jason812]

I got 4.926" but the punch or handle method works very well.

 

[blaser.306]

Thank you for the fast reply ,that's what I needed, and what would be the diameter of the bore the pin / punch is going into ?

 

[Jason812]

Thank you for the fast reply ,that's what I needed, and what would be the diameter of the bore the pin / punch is going into ?

. 315" diameter x .465" long. 30 degree angle on the taper according to the compound.

1" od junk cold roll that I skimmed the scale off. Overall is 6.6" only because that's how long it was when I dug it out of the dumpster. If I weren't cheap, I'd use better material but this has made a world of a difference instead of using the chuck key on the d1-4 mount sockets.

 

[blaser.306]

Again , Thank you . If I can find / upload the picture, I made a spanner for the er collet I made for my King 10x22 from a piece of 5/8" plate a36 . I bored the appropriate diameter from this rather than find close fitting pipe/ tube , knowing it would likely spring when parted.

 

[Jason812]

Muzzle brake fixture. 1" 304 stainless turned down to 15/16 to be held in a collet block on the mill. I put it back in the lathe to see what the runout would be after parting and the "barrel" portion behind the threads had zero indicator movement, same as the chuck. Either I got lucky or the Precision Matthews collets are pretty good too.

I just tested it with a A2 flash hider. Haven't made my own yet.

 

[Jason812]

Again , Thank you . If I can find / upload the picture, I made a spanner for the er collet I made for my King 10x22 from a piece of 5/8" plate a36 . I bored the appropriate diameter from this rather than find close fitting pipe/ tube , knowing it would likely spring when parted.

I should have specified, those dimensions are what I turned the pin to.