Page 309 - Carmex - Inch Catalog 2018-19 Rev. B

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Mill - Thread Technical Section

AMT

Carbide grade K20:
Uncoated Sub- Micron carbide grade for Aluminum and non- ferrous materials, Stainless Steels
and Titanium.

Cutting Feed inch/tooth
ISO Materials Speed Cutting Diameter = D
Standard
ft/min D ≤ .16 .16 < D < .35 D ≥ .35
Low & Medium Carbon Steels < 0.55%C 160-460 .0002 - .0012 .0004 - .0020 .0008 - .0039
P High Carbon Steels ≥0.55%C 200-430 .0002 - .0008 .0004 - .0016 .0008 - .0035

Alloy Steels, Treated Steels
Stainless Steel-Free Cutting 130-390 .0002 - .0008 .0004 - .0016 .0008 - .0035
M Stainless Steel-Austenitic

Cast Steels 230-390 .0002 -.0012 .0004 - .0020 .0008 - .0039
K Cast Iron 160-390 .0002 - .0012 .0004 - .0020 .0008 - .0039

Aluminum ≤12%Si, Copper 430-820 .0002 - .0016 .0004 - .0024 .0008 - .0051
N Aluminum >12%Si 260-590 .0002 - .0016 .0004 - .0024 .0008 - .0051
Synthetics, Duroplastics, Thermoplastics 260-590 .0002 - .0016 .0004 - .0024 .0008 - .0051

S Nickel Alloys, Titanium Alloys 65-260 .0002 - .0008 .0004 - .0016 .0008 - .0035

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