Does Aluminum "welding" to flutes means the rpm is too high?
I think maybe the last 2flute bit I broke was because I had run several programs at a very slow feedrate and max rpm (was 2,000 at the time). It started to cut well at the settings I calculated, but threw in the towel after a few pockets and galled up with material. I do run "Kool mist" coolant during cutting.
When I get things cutting, Can I slowly back off the rpm until I can tell things are starting to strain, then set the rpm a little above that to prevent running at too high of rpm?
I used to slow the feedrate, but I dont feel like I should have to cut so slow now that I have access to the proper spindle speeds.
Can someone give me what settings they would use for a .187", 3 flute high helix endmill, cutting .050" per pass? I have it programmed to feed at 20ipm, I'll likely start at 50% to see how things go. I have replacement .187" bits that should be here today from Maritool and I'd like to not break them all by this evening