Helical High Feed Endmills for Aluminum

[Machinerer]

I run mine at 9500 rpm, but that's the peak torque for my Haas MiniMills also, and same.
.5-.6DOC .1WOC 100-120IPM and -30db ear protection!

Who knows, maybe higher rpm would have gotten out of the harmonic zone. Or maybe it's just because of my steel shank. Or maybe it's just voodoo!

 

[CarbideBob]

High feed (bottom cutting) end mills need 5 to 10 times the normal feed to work right.
This is due to the chip thinning under.
In aluminum this puts you at speeds very few machine tools in the world can do.
Side cutting is not done with this style tool. You will kill the end of it or the side.
Understand and look at the cutting action taking place.
People talk truth and you will see it works and it fails.