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Milling-Machine Operations

Remember these are just general speeds and feeds, be sure to check the specifications provided by the manufacturer of your tools for optimal performance

Recommended Cutting Speed for Milling in Feet per Minute (fpm)

Work Material	Hardness, Bhn	Cutting Speed, fpm
Work Material	Hardness, Bhn	High-Speed Steel	Carbide
Plain Carbon Steel, AISI 1010 to AISI 1030	to 150 150 to 200	110 100 to 140 100 80 to 120	600 400 to 900 450 300 to 700
AISI B1111, AISI B1112, AISI B1113, Steel	140 to 180	140 110 to 200	650 400 to 1200
Plain Carbon Steel, AISI 1040 to 1095	120 to 180 180 to 220 220 to 300	195 80 to 120 85 70 to 110 60 30 to 80	600 400 to 800 350 300 to 500 200 100 to 300
All Alloy Steels Having .3% or Less Carbon Content: AISI 1320, AISI 3120, AISI 4130, AISI 4020, AISI 5020, AISI 4118, AISI 9310, etc.	180 to 220 220 to 300 300 to 400	80 65 to 100 60 30 to 80 40 30 to 50	350 300 to 600 300 200 to 350 125 100 to 150
All Alloy Steels Having More Than .3% Carbon Content: AISI 1340, AISI 2340, AISI 4140, AISI 4150, AISI 4340, AISI 5140, AISI 5150, AISI 52100, AISI 8660, AISI 9260, etc.	180 to 220 220 to 300 300 to 400	80 60 to 100 55 30 to 80 30 20 to 50	325 275 to 450 250 180 to 300 100 80 to 130

Recommended Feed in Inches per Tooth for High-Speed Steel Milling Cutters

Material	Hardness, Bhn	End Mills							Face Mills and Shell End Mills	Plain or Slab Mills	Side Mills	Form Relieved Cutters
		Depth of Cut .250"			Depth of Cut .050"
		Cutter Diameter			Cutter Diameter
		3/8	3/4	1 and up	1/8	3/8	3/4	1 and up
Feed per Tooth, Inch
Plain Carbon Steels, AISI 1010 to 1030	to 150 150 to 200	.002 .002	.004 .003	.006 .005	.001 .001	.003 .003	.006 .006	.008 .007	.012 .012	.008 .008	.008 .006	.004 .004
AISI B1111, B1112, B1113	140 to 180	.002	.004	.006	.001	.004	.006	.008	.012	.010	.008	.005
Plain Carbon Steels, AISI 1040 to 1095	120 to 180 180 to 220 220 to 300	.002 .002 .001	.004 .004 .002	.006 .005 .003	.001 .001 .0005	.003 .003 .002	.006 .006 .003	.008 .007 .004	.010 .012 .008	.008 .008 .004	.008 .006 .004	.004 .004 .003
All Alloy Steels Having .3% Carbon Content or Less	180 to 220 220 to 300 300 to 400	.002 .001 .0005	.004 .002 .002	.005 .003 .002	.001 .0005 .0003	.003 .002 .001	.006 .003 .002	.008 .004 .003	.010 .008 .004	.008 .005 .003	.008 .005 .003	.004 .003 .002
All Alloy Steels Having More Than .3% Carbon Content	180 to 200 220 to 300 300 to 400	.002 .001 .0005	.004 .002 .001	.005 .003 .002	.001 .0005 .0003	.003 .002 .001	.006 .003 .002	.008 .004 .003	.012 .008 .004	.008 .005 .003	.008 .005 .003	.004 .003 .002
Tool Steel	200 to 250 250 to 300	.002 .001	.004 .003	.005 .004	.001 .0005	.003 .001	.006 .002	.008 .003	.010 .004	.006 .004	.006 .004	.004 .003
Cast Iron	150 to 180 180 to 220 220 to 300	.003 .002 .002	.006 .005 .004	.008 .006 .005	.001 .001 .0005	.004 .003 .003	.007 .006 .005	.009 .007 .006	.014 .012 .006	.012 .010 .006	.009 .007 .006	.005 .004 .003
Zinc Alloys		.004	.008	.012	.002	.005	.008	.012	.020	.010	.010	.005
Brasses and Bronzes	100 to 150 150 to 250	.003 .002	.006 .004	.010 .006	.001 .0005	.004 .003	.008 .005	.010 .008	.014 .010	.008 .005	.008 .005	.004 .003
Free Cutting Brasses and Bronzes	80 to 100	.003	.008	.010	.001	.004	.008	.010	.014	.008	.008	.005
Cast Aluminum Alloy�as Cast		.003	.008	.010	.002	.003	.010	.012	.020	.010	.010	.005
Cast Aluminum Alloy�Hardened		.003	.006	.008	.001	.003	.008	.010	.012	.008	.008	.005
Wrought Aluminum Alloy�Cold Drawn		.003	.008	.010	.002	.003	.010	.012	.018	.010	.010	.005
Wrought Aluminum Alloy�Hardened		.003	.006	.008	.001	.003	.008	.010	.012	.008	.008	.005
Magnesium Alloys		.003	.008	.012	.002	.004	.010	.014	.020	.012	.012	.005
Ferritic Stainless Steel	135 to 185	.003	.004	.005	.001	.004	.006	.008	.012	.008	.008	.004
Austenitic Stainless Steel	135 to 185 185 to 275	.003 .002	.004 .003	.005 .005	.001 .0005	.004 .003	.006 .004	.008 .006	.012 .010	.008 .006	.008 .006	.004 .004
Martensitic Stainless Steel	135 to 185 185 to 225 225 to 300	.003 .003 .002	.005 .003 .002	.005 .005 .003	.001 .0005 .0005	.004 .004 .003	.006 .005 .003	.008 .006 .004	.012 .010 .008	.008 .006 .004	.008 .006 .003	.004 .004 .003
Plastics		.003	.008	.010	.002	.004	.010	.014	.020	.012	.012	.006