New ER32 x R8 Collet Chuck

[Buffalo20]

Tuesday of this past week, I received, from LMS, my new ER32 x R8 collet chuck (LMS# 5449). The chuck is very well made and has almost unmeasurable runout. I bought this for the Rockwell milling machine, the other 2 mills, use the Din 6388 style collets and collet chuck, but I had numerous ER32 collets,so this seemed acceptable option. With the 2 quick jobs I did this week, so far I really like it.

I did have to perform a slight modification to the collet chuck, I drilled a 1/4" hole in the shank of the chuck. This, so I can use a pin spanner wrench to tighten/loosen the collet nut. I find it much easier to tighten/loosen the collet nut, when the 2 wrenches are next to each other, With the nerve damage to the arm and the repeated rotator-cuff operations, it seems to put the least amount of stress on the body (shoulder).

I also put the reflective tach tape, then covered by a strip of clear packaging tape.

1 - the collet chuck
2 - in the mill
3 - the hole and the reflective tape
4 - using the wrenches
5 - the wrenchesView attachment 235255 View attachment 235256 View attachment 235257

 

[dlane]

Are you getting accurate rpm readings on that shiney chuck ?.

 

[Buffalo20]

Are you getting accurate rpm readings on that shiney chuck ?.

yes, I first wrapped the shaft in black tape, then a piece of reflective tape, I got the exact same reading as I get without the black tape. I also checked it with a contact type tach, the reading were within 5 rpms of the reflective tape reading.