Kennametal 6165397 Milling Insert KCSM40 LNGU432SRGE

Product Description

The KENNAMETAL 6165397 is a solid carbide milling insert in the LNGU series, designed for high-performance material removal in demanding milling applications. It carries the KCSM40 manufacturer grade and features a dual-layer PVD coating of TiAlN and TiN, which improves heat resistance and extends cutting edge life in interrupted and continuous cuts. The insert has a rectangular shape with a positive rake geometry, a chamfered and honed cutting edge style, and a GE chip breaker configuration. With four usable cutting edges per insert and a screw-in holding method, it delivers consistent performance and cost-effective tooling economy for licensed machinists and production tool setters.

This insert is suited for milling steel, stainless steel, superalloys, and titanium workpieces in both roughing and semi-finishing operations. It is compatible with the Kennametal Mill 4-11 cutter series. Typical applications include face milling, shoulder milling, and pocket milling in job shop and production environments. The LNGU insert style with a 90-degree included angle and positive rake makes it well suited for light-to-moderate depth-of-cut passes on difficult-to-machine materials where tool life and surface finish consistency are priorities.

Key Features

• KCSM40 grade with PVD-applied TiAlN and TiN dual-layer coating for thermal resistance and wear protection
• Four cutting edges per insert with a right-hand orientation for maximum tooling value
• GE chip breaker geometry optimized for steel, stainless steel, superalloys, and titanium
• Chamfered and honed cutting edge style for edge stability and reduced chipping risk
• Positive rake angle reduces cutting forces on challenging workpiece materials
• Screw-in insert holding method for secure, repeatable seating in compatible toolholders

Compatibility

Designed for use with the Kennametal Mill 4-11 cutter series. ANSI code LNGU432SRGE and ISO code LNGU110408SRGE. Confirmed compatible workpiece materials include steel, stainless steel, superalloys, and titanium.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the cutter body is secured before removing or seating inserts. Use the appropriate Torx or hex key driver to torque the clamping screw to the toolholder manufacturer specification. Inspect the insert pocket and seating surface for chips or debris before installing a new insert to ensure proper seating and runout control.