Friday, May 31, 2013

Speed and Feed Rates

This is a basic chart I keep for the speed and feed rates for the mill:

Aluminum Aluminum Steel Steel Bronze Bronze
End Mill RPM In/Min RPM In/Min RPM In/Min
1/8" 7640 107 2750 17 4584 64
3/16" 5093 71 1834 11 3056 43
1/4" 3820 53 1375 8 2292 32
5/16" 3056 43 1100 7 1834 26
3/8" 2547 36 917 6 1528 21
1/2" 1910 27 688 4 1146 16
*Brass same as aluminum

And speeds for the lathe:

Diameter Aluminum Steel Bronze
mm RPM RPM RPM
6.50 4000 1600 3200
12.50 2000 800 1600
19 1500 600 1200
25 1000 400 800
38 750 300 600
50 500 200 400
75 325 150 300
100 250 100 200
*1/3 RPM for knurling, threading, and parting

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