> Peter, to Kas' point you would probably be better off using drill rod and
> machining it first, then hardening. Rc 60 is too hard to machine, must be
> ground or EDM'd as you have discovered. As long as you are going to make a
> batch, should not cost more to go this way.
Mark,
That is exactly to what I was alluding to. It's better to start with a soft
material and work your way up. Make the shafts from proper gear/shaft
material and then have them 0.020" nitrided (only on the bearing surface).
Problem solved. I have a test shaft going in for manufacture this week.
Regards
Peter Vucinic
TR-4
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