Seco 02575291 Milling Insert LNKT050431PPTL1-M06 F40M

Product Description

The SECO 02575291 is a solid carbide milling insert carrying ANSI and ISO designation LNKT050431PPTL1-M06 in manufacturer grade F40M. This double-sided, left-hand insert features a rectangular shape with a negative rake angle of 15 degrees and a T-Land cutting edge style. The PVD-applied TiAlN and TiN coating improves wear resistance and thermal stability during interrupted and continuous milling operations. With a single cutting edge and screw-type holding method, this insert seats securely in compatible cutter bodies. It is sized for the LNKT-05 series and suits high-productivity face and shoulder milling on steel, cast iron, stainless steel, non-ferrous metals, superalloys, and titanium.

This insert is intended for professional machining environments where close tolerances and consistent tool life are required. It fits the 335.18 cutter series and targets primary workpiece materials coded P, K, and S — covering steel, cast iron, and superalloys including titanium — with secondary compatibility for cast iron and non-ferrous metals. The M06 chip breaker geometry is designed for medium-duty milling applications across a range of depths of cut up to 0.1969 inches. Machinists and tooling technicians working in job shops, production machining, and maintenance environments will find this insert applicable to a broad range of workpiece materials and setups.

Key Features

• Solid carbide fine-grain substrate with PVD TiAlN and TiN dual coating for extended wear life
• Negative 15-degree rake angle with T-Land edge for reliable chip control in steel and cast iron
• Double-sided insert design maximizes usable cutting edges per insert
• M06 chip breaker geometry suited to medium-duty milling passes
• Left-hand cutting configuration for compatible cutter body orientations
• ISO and ANSI standardized designation for straightforward cross-referencing

Compatibility

Designed for use with the 335.18 cutter series. Insert style LNKT, size code 050431, is compatible with cutter bodies in the LNKT-05 series that accept screw-held rectangular inserts.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the spindle fully stopped and machine locked out per applicable safety procedures. Seat the insert firmly in the pocket and tighten the clamping screw to the cutter body manufacturer's specified torque using the appropriate Torx or hex key — do not overtighten, as carbide inserts are brittle. Inspect the insert pocket for chips or debris before seating a new insert. Confirm correct hand orientation before engaging the cutter in the workpiece.