Tungaloy 6999179 Tomt Triangle Milling Insert AH120

Product Description

The TUNGALOY 6999179 is a solid carbide triangular milling insert in the TOMT series, designed for high-performance face and shoulder milling operations. Manufactured to the ANSI and ISO code TOMT100408PDER-MJ AH120, it carries a TiAlN coating applied via PVD process, delivering thermal resistance and wear protection across demanding cutting conditions. The insert features a positive rake geometry with a honed cutting edge, a corner radius of 0.0315 inches (1/32 inch), and supports a maximum depth of cut of 0.3940 inches (10.00 mm). Three cutting edges and a right-hand orientation make this a productive option for production machining environments.

This insert is suited for milling steel, stainless steel, cast iron, hard materials, superalloys, and titanium, covering material grades P15, M15, K15, and S10. It is appropriate for use in both roughing and semi-finishing applications where tool life and edge stability are priorities. The MJ chip breaker geometry is optimized for chip control across this broad range of workpiece materials. Installation is typically performed by machining professionals in production or job-shop settings using compatible toolholders from the EPA10, TPA10, TLA10, HPA10-M, and C-EPA cutter series.

Key Features

• TiAlN PVD coating in manufacturer grade AH120 for extended tool life in high-temperature cuts
• Triangular insert shape (TOMT style) with 60-degree included angle and positive rake
• Three right-hand cutting edges per insert for cost-effective edge utilization
• Honed cutting edge style reduces microchipping on entry and exit
• MJ chip breaker provides reliable chip control across steel, cast iron, and superalloy applications
• Maximum depth of cut of 0.3940 inches supports aggressive material removal rates

Compatibility

Compatible with EPA10, TPA10, TLA10, HPA10-M, and C-EPA cutter series toolholders. Insert size code 100408 corresponds to ANSI/ISO designation TOMT100408PDER-MJ. Screw-held, single-sided insert seating applies.

Installation Notes

Installation and indexing should be performed by a qualified machinist or tooling technician with the spindle fully stopped and machine power locked out. Use the appropriate Torx or hex key as specified by the toolholder manufacturer to secure the clamping screw to the correct seating torque. Inspect the insert pocket and seating surfaces for chips or debris before placing the insert. Never mix insert grades or geometries within a multi-pocket cutter body on the same operation.