Tungaloy 6811620 CNMG431-28 AH120 Turning Insert

Product Description

The TUNGALOY 6811620 is a CNMG431-28 indexable turning insert manufactured from solid carbide and finished with a TiAlN coating applied via PVD process. Sized to the CNMG series standard, it features an 80-degree diamond shape, a 0.5 inch inscribed circle, a 0.508 inch insert length, and a 0.0157 inch corner radius. With four cutting edges and a neutral hand orientation, it is engineered for high-efficiency material removal across a broad range of workpiece materials. Licensed machinists and CNC turning specialists install this insert in compatible toolholders for production and job-shop turning operations.

This insert is suited for turning, facing, and boring operations on steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries ISO material grade designations P15, P25, M15, M25, K15, K30, S10, and S25, making it a versatile choice across general-purpose and demanding machining environments. The 28 chip breaker geometry promotes controlled chip formation during medium-depth passes. It meets both ANSI and ISO standards and carries the industry-standard designation CNMG 431-28.

Key Features

• TiAlN PVD coating provides thermal resistance and extended tool life on ferrous and difficult-to-machine materials
• 80-degree diamond insert shape (Shape Code C) delivers strong cutting edge geometry for stable turning and facing
• Four cutting edges per insert reduce tooling cost per edge
• 28 chip breaker geometry supports controlled chip evacuation at medium depths of cut up to 0.1181 inches
• Honed cutting edge style minimizes micro-chipping at entry and exit
• Neutral hand orientation fits a wide selection of CNMG-compatible toolholders using clamp and pin holding methods
• Conforms to ANSI and ISO standards for drop-in replacement and cross-referencing

Compatibility

Designed for use in CNMG-style toolholders that accept a 0.5 inch inscribed circle, 3/16 inch thick, 80-degree diamond insert with a 0.2030 inch hole diameter and clamp-plus-pin holding. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, titanium, and hard materials per ISO code designations P, M, K, S, and H.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before seating or indexing the insert. Confirm the toolholder pocket and clamping pin are clean and free of chips before securing the insert. Follow the toolholder manufacturer torque guidance for the clamp screw - do not overtighten, as this can fracture the carbide substrate.