Wes wrote:
Today, I had to make some grippers for a machine that grasps a round part and then drives
6 bolts in to 50 lb/ft.

I was using some rubber with fabric re-inforcement. I learned that drill bits don't make
on size holes nor do end mills. Obviously, clamping forces have an effect on hole
diameter.

I ended up moving up in size until the 8-32 shcs fit.

This was one of those close enough applications.

Any tips on machining rubber?

Wes
--

The only thing Obama has fixed is Carter's reputation.



Freeze it with liquid nitrogen, then drill the holes. You could try just
putting it in the freeze depending on the type of rubber compound. or
just wait a couple of weeks and put it outside.

John