I have seen posted here before a formula or ration for machining speed. I
didn't understand it at the time, and still don't but a metal working guy I
know rattled it off to me the other day, and I was finally realized that
this is something I probably need to know. That and where to look up the
machining speed for various metals. Until I have just been guessing.
Probably cost me more than a few cutters and certainly has cost me time when
I set something up to run slowly so as to be sure not to break cutters.

Can somebody please point me in the right direction? Not just the ratio/formula, but some basic guidelines in how to apply it. Thank you.

Can somebody please point me in the right direction? Not just the ratio/formula, but some basic guidelines in how to apply it. Thank you.