Page 399 - Carmex - Inch Catalog 2022

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Mill-Thread Technical Section

Mini Mill-Thread vs. Taps

Features Mini Mill-Thread Taps
Thread surface quality High Medium
Thread geometry Very accurate Medium
Thread tolerances 4H, 5H, 6H with std cutter 6H with standard tap, 4H with specific tap
Machining time Same as tap or shorter Short
Tool breakage Almost not possible Could happen often
Machining load Very low High
Range of thread diameters Wide range of diameters Specific tap for each diameter
Right/Left hand threading Same cutter Specific tap for each
Geometric shape Full profile Partial profile

Cutting Data

MTSB type

Carbide grade - MT7:
Sub-Micron Grade with Titanium Aluminum Nitride multi-layer coating (ISO K10 - K20). This is a
general purpose grade, which can be used with all materials; it should be run at medium to high
cutting speeds.

Feed
Cutting inch/tooth
ISO
Standard Materials Speed Cutting Diameter=D
ft/min
Ø.04 Ø.06 Ø.08 Ø.12 Ø.16 Ø.20
Low and Medium Carbon Steels < 0.55%C 200 - 390 .0016 .0020 .0020 .0028 .0035 .0043

P High Carbon Steels ≥ 0.55%C 200 - 300 .0012 .0016 .0020 .0024 .0031 .0035

Alloy Steels, Treated Steels 160 - 260 .0012 .0016 .0016 .0020 .0020 .0024
Stainless Steel - Free Cutting 230 - 330 .0008 .0012 .0012 .0016 .0020 .0024
M Stainless Steel - Austenitic 200 - 300 .0008 .0012 .0012 .0016 .0020 .0024

Cast Steels 230 - 300 .0012 .0016 .0016 .0020 .0020 .0024
K Cast Iron 130 - 260 .0016 .0020 .0020 .0028 .0035 .0043

Aluminum ≤ 12%Si, Copper 330 - 660 .0016 .0020 .0020 .0028 .0035 .0043
N Aluminum > 12%Si 200 - 460 .0012 .0012 .0012 .0016 .0020 .0024

Synthetics, Duroplastics, Thermoplastics 160 - 660 .0035 .0039 .0043 .0047 .0055 .0063
S Nickel Alloys, Titanium Alloys. 70 - 130 .0012 .0012 .0012 .0016 .0016 .0020

H Hardened Steel, 45-50HRc 200 - 230 .0012 .0016 .0016 .0020 .0020 .0024

B12-19