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Speeds and Feeds

Running the correct PROMAX solid carbide end mills at the proper speeds and feeds is critical to obtaining the best production times and tool life. The results from the information and formulas below will give a good starting point in running your finishing end mills and your roughing end mills. These formulas and tool suggestions provide useful guidelines for your specific job. Please note that whether you are using roughing end mills or finishing end mills these numbers are starting points and may need adjusting as you fine tune your machining process.

The PROMAX Technical Department is here for you if you find that you need assistance in choosing the correct solid carbide end mills for your particular job. Likewise, we are here to assist you in determining the correct feeds and speeds starting points based on roughing end mills or finishing end mills you are using.

Please contact our very knowledgeable Technical Department at 800-878-0502. We are here for you.

See below for Roughing Information. Click here for Finishing Information.

Recommended Feeds & Speeds & Tool Selection Guidelines

For Roughing Applications Using PROMAX Tools

Material Recommended Tool Style Recommended Coating BHN SFM FPT 1/4" -
3/8" DIA.
FPT 1/2" -
5/8" DIA.
FPT 3/4" -
1" DIA.
Aluminum SER 102
SER 110
SER 119
ZrN, TiCN 80 1200 To Max .001  - .004 .004  - .008 .008  - .020
Aluminum High Silicone Content SER 102
SER 110
SER 119
ZrN, TiCN, AlTiN, nACRo® 100 600 .001  - .003 .003  - .005 .005  - .008
Cast Iron SER 100
SER 117
SER 120
SER 122
TiCN, AlTiN, nACRo® 160 500 .001  - .002 .002  - .004 .005  - .006
Copper Brass SER 102
SER 110
SER 119
TiCN, ZrN 100 750 0.001 0.002 .004  - .006
High Temp Alloys Nickelbase (Inconel, Waspaloy, Rene, Hastaloy) SER 101
SER 103
SER 120
TiCN, AlTiN, nACRo® 200 60 .008  - .0012 .0012 - .0018 .0018 - .0025
Plastic and Composites SER 100
SER 102
SER 120
TICN, ZrN
1000+ .002  - .003 .004  - .007 .008  - .012
Steel SER 100
SER 120
SER 121
TiCN, AlTiN, nACRo® 200 275 .001  - .002 .002  - .003 .003  - .004
Steel Stainless SER 100
SER 101
SER 103
SER 117
SER 120
SER 122
TiCN, AlTiN, nACRo® 200 200 .001  - .002 .002  - .003 .003  - .004
Steel, Tool SER 101
SER 103
SER 120
SER 121
TiCN, AlTiN, nACRo® 200 200 0.001 0.002 .003  - .004
Titanium SER 101
SER 103
SER 120
TiCN, AlTiN, nACRo® 275 160 0.001 .002  - .003 .004  - .006

Roughing Application Formulas:
Speeds and Feeds to be considered as a starting point. Values calculated at:
Axial Cut (depth) = Diameter x 1.0
Radial Cut (width) = Diameter x .5 to Diameter x 1.0 (Full Slot)

Formulas:
Spindle Speed (RPM) = (3.82 x SFM) / Diameter
Feed (Inches Per Minute) = FPT (Feed per Tooth) x RPM x Number of Flutes

Example: For starting speed using a ½” 4 flute end mill cutting Titanium at a hardness
of around 275 BHN, find SFM on above chart (SFM=160) and calculate RPM using formula as follows:
RPM = 3.82 x 160 (SFM) / .5 (DIA) = 1222 RPM.

For starting feed: .002 (FPT) x 1222 (RPM) x 4 (Flutes) = 9-3/4 IPM.

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Recommended Feeds & Speeds & Tool Selection Guidelines

For Finishing Applications
Calculated with Chip Thinning @ .030 Radial Depth of Cut Finish Pass

Material Recommended Tool Style Recommended D Coating BHN SFM FPT 1/4" -
3/8" DIA.
FPT 1/2" -
5/8" DIA.
FPT 3/4" -
1" DIA.
Aluminum SER 108
SER 109
SER 110
SER 115
TiCN, ZrN 80 1200 To Max .0015  - .0039

.0063  -
.012

.015
-
.023
Aluminum High Silicone Content SER 108
SER 109
SER 110
SER 115
TiCN, ZrN 100 800 .0015
-
.0039
.0063
-
.012
.015
-
.023
Cast Iron

SER 190
SER 191
SER 192
SER 155
SER 156
SER 157
SER 158
SER 159
SER 106
SER 111
SER 112
SER 113
SER 160
SER 161

TiCN, AlTiN, nACRo® 160 600 .0015
-
.0028
.0042
-
.0094
.013
-
.018
Copper Brass SER 108
SER 109
SER 110
SER 111
SER 115
TiCN, ZrN 100 900 0.0015 - 0.0037 0.0063 - 0.0094 .013
-
.021
High Temp Alloys - Nickel Base (Incoloy, Inconel, Waspaloy, Rene, Hastaloy) SER 190
SER 191
SER 192
SER 155
SER 156
SER 157
SER 158
SER 159
SER 111
SER 112
SER 160
SER 161
AlTiN, TiCN, nACRo® 200 80 .0012
-
.0022
.0025
-
.0042
.0046 - .0073
Plastic and Composites SER 108
SER 109
SER 110
SER 111
SER 115
TiCN, ZrN 1200+ .0031
-
.0055
.0084
-
.014
.017
-
.026
Steel SER 190
SER 191
SER 192
SER 155
SER 156
SER 157
SER 158
SER 159
SER 111
SER 112
SER 160
SER 161
TiCN, AlTiN, nACRo® 200 400 .0015
-
.0028
.0042
-
.007
.010
-
.015
Steel, Stainless SER 190
SER 191
SER 155
SER 156
SER 157
SER 158
SER 159
SER 106
SER 111
SER 112
SER 113
SER 160
SER 161
TiCN, AlTiN, nACRo® 200 350 0.0015 - 0.0028 0.0042 -
0.007
.010
-
.015
Steel, Tool SER 155
SER 156
SER 157
SER 111
SER 112
SER 160
SER 161
TiCN, AlTiN, nACRo® 200 320 0.0015 - 0.0028 .0042
-
.007
.010
-
.015
Steel, Hardened SER 155
SER 156
SER 157
SER 111
SER 112
TiCN, AlTiN, nACRo® 52
-
60 RC
30
-
60
0.001
- 0.0018
0.0032 - 0.0047 .0064 - .0088
Titanium SER 190
SER 191
SER 192
SER 155
SER 156
SER 157
SER 158
SER 159
SER 111
SER 112
SER 160
SER 161
TiCN, AlTiN, nACRo® 275 400 0.0015 - 0.0028 .0042
-
.007
.010
-
.018

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