[monte55]

It was suggested to speed up my spindle. My max speed is 2580 rpm. With
cutting oil and light down feed, I plunged the 1/4" 4 flute center cut carbide mill through through the hardened hub on my small centrifugal clutch. I bored
6 holes and my end mill is still good. I was cutting at 300 rpm. Thanks for the help guys..................Nick