Hi all, I'm ghaving a hell of a time trying to drill a hole in 304SS.
It's a .180 (#15) hole, 1.1"deep...
I've tried cobalt drills, pecking every .200" at 75 SFM (1600 rpm), and they lasted about 10 parts.
I just got 2 carbide drills that didn't last one part, at the recommended 200SFM and .003/rev feed. I tried pecking 3 times just to get some oil in the hole, I know carbide doesn't like pecking much.
anyone have any tips for drilling this hole?? Also, the material is quality Ugine material... so no issues there.