Tungaloy 6861242 AH140 Solid Carbide Milling Insert Lqmu

Product Description

The TUNGALOY 6861242 is a solid carbide milling insert in the LQMU series, designed for face and shoulder milling operations in steel and stainless steel applications. It carries the AH140 manufacturer grade with a TiAlN coating applied via PVD process, which provides thermal resistance and extended tool life under demanding cutting conditions. The insert measures 0.4330 inches in length and 0.3540 inches in width, with a thickness of 0.3270 inches. Four cutting edges and a honed cutting edge style make this a productive choice for high-volume material removal. Negative rake geometry and a 90-degree included angle are engineered for stability in interrupted and continuous cuts. Licensed HVAC techs and machinists working in precision metal removal will find this insert well-suited for production milling environments.

This insert is intended for milling steel and stainless steel workpieces, covering material grades P and M per ISO classification. It is compatible with cutter series TPQ11, TPQ18, and EPQ11. The LQMU110708PNER-MJ chip breaker designation indicates an MJ-style chip breaker optimized for steel and stainless steel chip control. It is a right-hand, double-sided insert held in place by screw clamping, making it a standard fit for compatible toolholders used in CNC and manual milling operations in job shop and production environments.

Key Features

• AH140 grade with TiAlN PVD coating for extended tool life in steel and stainless steel
• Four usable cutting edges on a double-sided insert body for cost-effective tooling
• Honed cutting edge style reduces chipping and improves edge stability
• MJ-style chip breaker designed for reliable chip control in P and M material grades
• Negative rake, 90-degree geometry provides rigid support and predictable cutting forces
• Maximum depth of cut of 9.00 mm (0.3540 inches) for shoulder and face milling profiles

Compatibility

Compatible with cutter series TPQ11, TPQ18, and EPQ11. ANSI and ISO code: LQMU110708PNER-MJ AH140. Insert size code 110708. Designed for screw-clamped LQMU-series toolholders conforming to ISO standards.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torque screwdriver for the clamping screw to avoid seat damage - refer to the toolholder manufacturer specification for fastener torque. Inspect the insert pocket and clamping screw for wear or contamination before indexing to a fresh cutting edge.