Speed and Feed Rates

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

2 flute Aluminum Aluminum Steel Steel Bronze Bronze End Mill RPM In/Min RPM In/Min RPM In/Min 1/8" 1800 2 1800 2 1800 2 3/16" 1800 3 1800 3 1800 3 1/4" 1800 4 1380 3 1800 5 5/16" 1800 4 1100 3 1710 5 3/8" 1800 5 920 3 1430 5 1/2" 1530 5 690 3 1070 5
4 flute Aluminum Aluminum Steel Steel Bronze Bronze End Mill RPM In/Min RPM In/Min RPM In/Min 1/8" 1800 4 1800 5 1800 4 3/16" 1800 3 1800 7 1800 7 1/4" 1800 7 1380 7 1800 9 5/16" 1800 9 1100 6 1710 10 3/8" 1800 10 920 6 1430 10 1/2" 1400 10 690 6 1070 10
Aluminum Steel Bronze Drill RPM RPM RPM 1/8" 1800 1800 1800 3/16" 1800 1800 1800 1/4" 1800 1450 1800 5/16" 1800 1160 1800 3/8" 1800 970 1530 1/2" 1800 730 1150

And speeds using carbide for the lathe:

Diameter	Aluminum	Steel
mm	RPM	RPM
6.5	4000	4000
12.5	4000	4000
19	4000	4000
25	3880	3110
38	2560	2040
50	1940	1550
75	1290	1040
100	970	780
125	780	620
150	650	520

NOTE: Brass and bronze are the same as aluminum

NOTE: 1/4 to 1/6 RPM should be used for knurling, threading, and parting using HSS.