- Soft Grade Materials

The following are base line recommendations. Adjust your speeds and feeds according to your individual circumstances. Call our technical support department for further assistance with speeds and feeds at 1-866-583-TOOL.

Feed (IPM) = RPM x CPT x # of flutes

RPM = SFM x 3.82/tool diameter

Material	SFM	1/8"	3/16"	1/4"	3/8"	1/2"	5/8"	3/4"	1"
Non-Ferrous
Aluminum Alloys	800-2000	.001	.002	.003	.004	.005	.006	.008	.010
Magnesium	800-1500	.001	.0015	.002	.003	.004	.006	.008	.009
Copper	800-1000	.001	.0012	.002	.0025	.003	.004	.004	.005
Copper Alloys	800-1000	.001	.0012	.002	.0025	.003	.004	.004	.005
Plastics, Acrylics	200-500	.001	.002	.003	.004	.006	.008	.010	.012
Carbon, Graphites	200-500	.002	.003	.004	.006	.008	.009	.010	.012
Stainless Steel
Precipitation	80-250	.0003	.0005	.001	.001	.002	.003	.004	.005
Austenitic	100-350	.0002	.0003	.0005	.001	.002	.0025	.0035	.0045
Martensitic	80-250	.0002	.0003	.0005	.001	.0015	.0025	.003	.004
High Temp Alloys
Cobalt Base	50-90	.0003	.0004	.0006	.0008	.0012	.0015	.002	.0025
Nickel Base	50-95	.0004	.0005	.0008	.001	.002	.0025	.003	.004
Iron Base	70-125	.0004	.0005	.001	.0015	.002	.0025	.003	.004

Material	SFM	1/8"	3/16"	1/4"	3/8"	1/2"	5/8"	3/4"	1"
Steels
High Strength Steels 4140, 4340, 6150	100-160	.0004	.0006	.001	.0015	.002	.0025	.003	.004
High Alloy - Die & Mold	100-160	.0004	.0006	.001	.0015	.0015	.0025	.003	.004
Medium Alloy	100-350	.0005	.0005	.001	.002	.0025	.0035	.004	.005
Low Alloy	100-350	.0005	.0007	.0012	.002	.003	.004	.005	.006
Cast Iron
Ductile Iron	120-350	.0005	.008	.0015	.002	.0022	.003	.004	.006
Cast Iron	120-300	.0005	.001