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Thread Mill Feed and Speed Chart

Material HB/Rc Speed
SFM*
Uncoated
Speed
SFM
ALTiN+
Feed (Inches Per Tooth)
Tool Diameter
.032-.056 .059-.090 .100-.190 .200-.350 .370-.595 .600+
Cast Iron 160 HB 100-200 200-425 .0004-.001 .0004-.0008 .0004-.0014 .0004-.002 .0004-.0035 .0004-.006
Carbon Steel 18 Rc 100-200 190-425 .0003-.001 .0003-.0008 .0003-.0014 .0003-.002 .0003-.005 .0003-.006
Alloy Steel 20 Rc 80-200 200-375 .0003-.001
2 Passes
.0003-.0008
3 Passes
.0003-.0014 .0003-.0024 .0003-.005 .0003-.006
Tool Steel 20 Rc 80-175 175-250 .0003-.0004
2 Passes
.0004-.0005
3 Passes
.0003-.0005 .0003-.0009 .0003-.0026 .0003-.004
300 Stainless Steel 150 Hb 90-120 120-255 .0003-.0005
2 Passes
.0003-.0006
3 Passes
.0003-.0007 .0003-.002 .0003-.0035 .0003-.0045
400 Stainless Steel 195 Hb 90-150 140-375 .0003-.0005
2 Passes
.0003-.0006
3 Passes
.0003-.0007 .0003-.002 .0003-.0026 .0003-.0045
High Temp Alloy
(Ni & Co Base)
20 Rc 50-125 100-125 .0003-.0004
3 Passes
.0003-.00045
3 Passes
.0003-.0005
2 Passes
.0003-.0009 .0003-.0026 .0003-.004
Titanium 25 Rc 50-130 100-170 .0003-.0004
3 Passes
.0003-.00045
3 Passes
.0003-.001
2 Passes
.0003-.0009 .0003-.0015 .0003-.003
Heat Treated Alloys
(38-45Rc)
40 Rc 50-90 90-150 .0003-.0004
3 Passes
.0003-00045
3 Passes
.0003-.0005
2 Passes
.0003-.0008 .0003-.001 .0003-.0025
Aluminum 100 Hb 100-800 100-1200 .0005-.0015 .0005-.002 .0005-.0025 .0005-.003 .0005-.006 .0005-.009
Brass, Zinc 80 Hb 200-350 200-750 .0005-.0015 .0005-.002 .0005-.0025 .0005-.003 .0005-.006 .0005-.009

* SFM = Surface Feed per Minute

Parameters are a starting point based on machinability rating at hardness listed.
Check machinability rating of the material to be machined and adjust accordingly.