Page 376 - Carmex - Metric Catalog 2021

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Mill-Thread Technical Section

FMT - Fast MT type

Carmex has designed a unique line of solid carbide thread milling tools FMT for
increased productivity and high performance.
Large number of flutes enables to achieve significant shorter machining time.

FMT vs. Taps

Features FMT Taps
Thread up to bottom at blind hole Possible Not possible
Machining load Very low High
Thread surface quality High Medium
Very reliable, especially
Process reliability Medium
for expensive work pieces
Thread geometry Very accurate Medium
Cycle time Same or faster than tap Fast

Case Study

Application
Internal right hand thread: M6x1.0
Thread length: 10 mm, Blind hole
Bore size: Ø 5 mm
Chamfer: 0.9 mm
Work piece material
Steel SAE 4340

Cutter description
FMT08048F10 1.0 ISO - with internal coolant
Shank diameter: Ø8 mm
Cutting diameter: Ø4.8 mm
Number of flutes: 6
Cutting length: 10.5 mm
Total length: 64 mm

Cutting conditions
Cutting speed: 130 m/min Feed: 0.016 mm/tooth
Machine

Mori Seiki NV5000 Coolant: emulsion 5%
Results

Tool life : 2,170 threads
Cycle time: 1.5 sec

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