View Single Post
  #2   Report Post  
Harold & Susan Vordos
 
Posts: n/a
Default drive pin on R8 collets


"Charles A. Sherwood" wrote in message
...
I recently bought a used rockwell mill. There is no drive pin in the
spindle that is suppose to engage with the R8 collet. My other mills
do have drive pins. Is this a problem that I need to fix??
I seem to remember this question before and it might be ok??

thanks
chuck


Mixed reviews on that subject. Personally, I'd fix it, but there are some
that go out of their way to remove it. It's nice to know that the collet
isn't going to spin on you when you tighten the draw bar, which is it's real
intended purpose, not to drive the cutting tool, although I have no doubt
that it also helps in that department. In all my years on the machines
I've never run a mill without one, nor have I ever busted one, although the
shank of one of my boring heads is a little buggered up from one from a
crash many years ago. I guess you might say it's a personal judgment
call.

Harold