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Hard Grade Materials

The following are base line End Mill Speed and Feed recommendations.  Adjust your end mill speeds and feeds according to your individual circumstances.  Call our technical support department for further assistance with speeds and feeds at 239-314-4303.
 
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

500-1000

.001

.0015

.002

.003

.004

.005

.006

.008

Copper

800-1000

.001

.0015

.002

.0025

.003

.004

.0045

.005

Copper Alloys

800-1000

.001

.0015

.002

.0025

.003

.004

.004

.005

Plastics

200-500

.001

.002

.003

.004

.006

.008

.01

.012


Material
SFM
1/8"
3/16"
1/4"
3/8"
1/2"
5/8"
3/4"
1"
Stainless Steels
 
 
 
 
 
 
 
 
 
Precipitation
17/4, 17/7, AF-71,
Custom 450/635, 15/7
90-125
.0003
.0005
.001
.001
.002
.003
.004
.005
Austenitic
304, 310, 314, 316, 321
330, 347, 348
90-150
.0002
.0003
.0005
.001
.002
.0025
.0035
.004
Martensitic
420, 430F, 440C, 446
90-170
.0002
.0003
.0005
.001
.0015
.0025
.0025
.004
High Temp Alloys
 
 
 
 
 
 
 
 
 
Cobalt Base
50-80
.0003
.0004
.0006
.0008
.0012
.0015
.002
.0025
Nickel Base
50-80
.0004
.0005
.0008
.001
.002
.0025
.003
.004
Iron Base
70-110
.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 Steel
4140, 4340M,
Armor Plate

80-140

.0004
.0006
.001
.0015
.0015
.0025
.003
.004
High Alloy Steel -
Mold & Die

80-140

.0004
.0006
.001
.0015
.0015
.0025
.003
.004
Medium Alloy
200, 250, 300

80-140

.0005
.0005
.001
.002
.0025
.0035
.004
.005
Low Alloy - Maraging

100-120

.0005
.0007
.0012
.002
.003
.004
.005
.006
Cast Iron









Ductile Iron

80-140

.0005
.008
.0015
.002
.0022
.003
.004
.006
Cast Iron

80-140

.0005
.001
.002
.003
.004
.005
.006
.008
Titanium









Titanium Alloys

80-180

.0003
.0004
.0005
.001
.0015
.0025
.003
.004

 

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