Page 372 - Carmex - Metric Catalog 2021

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Mill-Thread Technical Section

Cutting Data

CMT Spiral Multi Flute Inserts

Carbide grade - MT8:
Sub-Micron Grade with Aluminum Titanium Nitride (AlTiN) multi-layer coating (ISO K10-K20).
Extremely high heat resistant and smooth cutting operation, for high performance, and normal
machining conditions. General purpose for all materials.

Feed mm/tooth
ISO Cutting Speed Cutting Diameter = D
Material
Standard m/min
ø16-ø35
Low and Medium Carbon Steels <0.55%C 60 - 120 0.14 - 0.24
P High Carbon Steels ≥0.55%C 60 - 90 0.12 - 0.24
Alloy Steels,Treated Steels 50 - 80 0.08 - 0.20
Stainless Steel-Free Cutting 70 - 100 0.08 - 0.19
M Stainless Steel-Austenitic 60 - 90 0.08 - 0.19
Cast Steels 70 - 90 0.08 - 0.20
K Cast Iron 40 - 80 0.14 - 0.24

Aluminum ≤12%Si, Copper 100 - 200 0.14 - 0.26
N Aluminum >12%Si 60 - 140 0.08 - 0.22
Synthetics, Duroplastics, Thermoplastics 50 - 200 0.17 - 0.28
S Nickel Alloys, Titanium Alloys. 20 - 40 0.05 - 0.14
Hardened Steel, 45-50HRc 60 - 70 0.07 - 0.17
H
Hardened Steel, 51-55HRc 50 - 60 0.06 - 0.16

B12-10