Page 307 - Carmex - Inch Catalog 2018-19 Rev. B

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Mill - Thread Technical Section

FMT Fast MT

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
MT8 Sub Micron grade with advanced PVD triple coating (ISO K10-K20).
Extremely high heat resistant and smooth cutting operation, for high performance and normal machining
conditions. General purpose for all materials.

Case Study

Application
Internal right hand thread: M6x1.0
Thread length: .39”, Blind hole
Bore size: Ø.197
Chamfer: .035
Work piece material
Steel SAE 4340
Cutter description
FMT08048F10 1.0 ISO- with internal coolant
Shank diameter: Ø8 mm
Cutting diameter: Ø.189”
Number of flutes: 6
Cutting length: .41”
Total length: 2.5

Cutting conditions
Cutting speed: 426 ft/min Feed: 0.00063 inch/tooth
Machine
Mori Seiki NV5000 Coolant: emulsion 5%
Results
Tool life : 2,170 threads
Cycle time: 1.5 sec

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