atex57
Stainless
- Joined
- Sep 6, 2006
- Location
- SW Wisconsin
I need to drill an 1/8" dia 4" deep in 4140. I only have 2500 RPM lathe and spray mist through tool available. What would you recommend, annealed or heat treated to RC43? What should I look out for? Done a bunch of 5/16 and 1/2 no problem. From the drill mfg web site it looks like .00015 feed and all the RPM I've got.
Thanks, Ed.
Thanks, Ed.