Speeds and Feeds

Hi all,

I have been working out some speed and feed data for my Sherline 5400
mill. Mr Machinist tells me that I need a spindle speed of 6112 for a
3/8" 4 flute end mill with a feed rate of 24 IPM on aluminum.

The Sherline is capable of 2700 rpm on the spindle so I assume that
since the spindle speed is about 44% of the desired speed of 6112 rpm
that my feed rate should also be 44% of the recommended feed rate
which would be about 10 or 11 IPM.

Are these assumptions correct?

Thanks in advance

John Guenther