Kennametal 1157892 Milling Insert SEAN1203AFSNLN KC725M

Product Description

The KENNAMETAL 1157892 is a solid carbide milling insert designated by ISO code SEAN1203AFSNLN and manufactured in grade KC725M. It carries a multilayer PVD coating of TiN, TiCN, and TiN applied in sequence, which delivers a balance of wear resistance and toughness suited to interrupted and continuous milling operations. The insert is square in shape with a neutral hand orientation, a 90-degree included angle, and a 20-degree relief angle. The corner radius measures 0.0449 inches (1.14 mm) and the insert thickness is 0.1252 inches. It is held in the toolholder by a screw-clamp method and features the LN chip breaker geometry. Installation is performed by machinists and tooling technicians in shop and production environments.

This insert is designed for milling steel, stainless steel, superalloys, and titanium workpieces, covering ISO material application groups P, M, and S. The KC725M grade and PVD multilayer coating make it well suited to demanding cuts where heat generation and edge wear are primary concerns. It fits SEAN-series toolholders accepting a size 42 insert with a 0.5000-inch inscribed circle. Typical applications include face milling, shoulder milling, and pocket milling operations on machining centers in job shop and production environments. The LN chip breaker geometry assists with chip control across the primary workpiece materials listed.

Key Features

• ISO code SEAN1203AFSNLN in KC725M solid carbide grade
• Multilayer PVD coating: TiN, TiCN, TiN for wear resistance and toughness
• Square insert shape with 90-degree included angle and 20-degree relief angle
• Corner radius of 0.0449 inches (1.14 mm) for controlled edge engagement
• LN chip breaker geometry for effective chip control in steel and superalloy milling
• Screw-clamp insert holding method for secure, repeatable seating
• Neutral hand orientation for flexible toolholder compatibility

Compatibility

Designed for SEAN-series screw-clamp milling toolholders accepting a size 42 square insert with a 0.5000-inch inscribed circle. Suitable for machining steel, stainless steel, superalloys, and titanium per ISO material groups P, M, and S.

Installation Notes

Insert replacement is performed by machinists or tooling technicians with the machine spindle fully stopped and locked out per facility lockout/tagout procedures. Use the correct torx or hex key specified by the toolholder manufacturer to seat the screw clamp; do not overtighten. Inspect the insert pocket and seating surface for chips or debris before installing a new insert. Verify corner radius and grade selection against the programmed feed rate and depth of cut before resuming operation.