Kennametal 5090496 CNMG431MS KCU10 Turning Insert

Product Description

The KENNAMETAL 5090496 is a CNMG431MS indexable turning insert in grade KCU10, designed for high-productivity metal cutting in turning, facing, and boring operations. The insert is manufactured from solid carbide and carries a PVD-applied TiAlN coating that resists heat and wear at elevated cutting speeds. The 80-degree diamond shape (CNMG insert style) provides a strong cutting edge geometry with a negative rake angle of 13 degrees, while the MS chip breaker controls chip flow across a range of depths of cut. With four usable cutting edges per insert, it delivers strong cost-per-edge value in production environments. Licensed machinists and CNC operators working in job shop or production turning applications are the primary users.

This insert is built for primary use on steel and stainless steel, with rated capability on superalloys and titanium as well. The MS chip breaker geometry is suited to light-to-medium depth finishing and semi-finishing passes. It fits the KENNAMETAL KENLOC toolholder series and is secured via clamp and pin holding method. Typical applications include external turning, internal boring, and shoulder facing on CNC lathes and turning centers in both job shop and high-volume production settings. The insert carries ANSI and ISO standard designations and is classified for multi-use turning operations across its four cutting edges.

Key Features

• TiAlN coating applied via PVD process for thermal resistance and extended tool life on ferrous and difficult-to-machine materials
• MS chip breaker geometry optimized for steel, stainless steel, superalloys, and titanium (ISO material codes P, M, S)
• Negative rake angle (13 degrees) and honed cutting edge style for edge strength and controlled chip formation
• Four cutting edges per insert for reduced tooling cost per operation
• Clamp and pin holding method compatible with KENLOC toolholder series
• Rated for turning, facing, and boring in a single insert geometry

Compatibility

Designed for use in KENNAMETAL KENLOC series toolholders that accept CNMG-style inserts with clamp and pin holding. Compatible with toolholders sized for a 1/2-inch inscribed circle CNMG insert. Suitable for CNC lathes and turning centers running steel, stainless steel, superalloys, and titanium workpieces. Secondary workpiece material compatibility includes cast iron, non-ferrous materials, and additional superalloy grades per ISO codes K, N, and S.

Installation Notes

Installation is performed by qualified machinists or CNC tooling setters. Power down the machine and follow lockout/tagout procedures before indexing or replacing the insert. Seat the insert fully against the toolholder pocket locating surfaces before engaging the clamp and pin to ensure proper edge position and prevent micro-movement under cutting loads. Do not use damaged or chipped inserts, as edge failure can cause workpiece damage or toolholder pocket wear.