I always look at the manufacturer's recommendations too. I usually start in the middle of their range and go from there. I suggested a higher rpm because of past experience (but with different SS and probably a different tap). I like your approach. Just, after running it, if the threads aren't fully formed, try increasing the rpm. Slowing it down might help some tapping situations but not usually with a form tap.
Geof- Thanks, I'll look into that G31. I always start high, like I said, to be safe, but I like the protected move method much better. |