We cut a lot of parts out of 15-5P, heat treated and annealed. I’ve found light radial cuts (.060") work the best for a compromise of tool life and speed. I would typically run around 450SFM with a chip load of about .009" per flute (the .009" actually calcs out to aprox .005 per flute using chip thinning). I would also recommend using as much of the flute length as possible in the cut. The one major thing to watch for is that the tool does run into any corners where the tool would be engaged more than 30% or so. Good luck

Ive been looking over your forum and i have to admit I am jealous of all the knowledge you guys have. I am a currently trying to talk myself into switching to Mastercam. And considering that the software i use (surfcam) doesnt have a decent forum im about to make the jump. Theres nothing worse than getting stuck and not having anywhere to go for answers.I have to admit considering my limited knowledge other than running code by mastercam, that it is 100% better at finishing ops, surfcam has them on roughing but its the finished product that counts. going to the dark side finally