Quote Originally Posted by luv2ride View Post
YG1 high helix aluminum 2 Fl HSSendmills work great. They suggest 4600 RPM 61 IPM if I recall. I run them like that all day long at .25-.3 DOC and .05-.075 WOC. They are 42 deg helix and sound great. I use the same RPM and 20IPM .01 WOC for finish pass at full pocket depth.

I found the high helix is what makes the big difference.
That is an MRR of only about 1.3 cu. in./min. These machines are capable of nearly 3X that, so you're really not working the machine at all....

Regards,
Ray L.