Todays Project - What did you do today?

[dallen]

(04-11-2014, 08:44 AM)arvidj Wrote: I have read that the hardening process applied to the threads on ball screws makes them very difficult to machine. Would you care to comment on how you went about machining yours?

Thanks,
Arvid

used an cnmg insert which was rated for hardened tool steel and took very shallow cuts till I had the ball thread which makes for one heck of an interrupted cut removed then it was pretty easy cutting from there on. The threading was straight up single point threading job using a Kennametal insert that I had a couple of which handled the inner portion of the screw fine, but I still took shallow cuts with .005 being the deepest I went in one pass.


BIGGEST thing is to have it set up ridged as close to the chuck as you can get and have room to work.

The first ball screw I turned I drilled and tapped it, hope I never have to do that again, Ball Screws and Taps don't really mix as far as I'm concerned.