Seco 74003666 Milling Insert SEKR1204AFTN-ME16 T25M Carbide

Product Description

The SECO 74003666 is a solid carbide milling insert carrying ANSI/ISO designation SEKR1204AFTN-ME16 and manufactured grade T25M. This single-sided, square-shaped insert features a TiCN coating applied via CVD process, a medium grain carbide substrate, and a positive rake geometry with a T-Land cutting edge style. The 20-degree relief angle and ME16 chip breaker geometry are engineered for controlled chip evacuation and consistent performance in demanding milling applications. With four usable cutting edges and a 0.0394-inch corner radius, this insert delivers repeatable results across compatible face and shoulder milling operations.

This insert is suited for milling steel, stainless steel, superalloys, and titanium, covering material application codes P, M, and S. It fits the SEKR-12 series and is compatible with the Cutter Series R220.13-12. The neutral hand orientation and wedge clamp holding method make it a straightforward drop-in for properly configured toolholders. Typical users include CNC machinists and tooling technicians in production and job-shop environments working with ferrous and exotic alloy workpieces.

Key Features

• Solid carbide construction with CVD-applied TiCN coating for wear resistance in steel and stainless applications
• Square insert shape with 90-degree included angle and 0.0394-inch corner radius for shoulder and face milling
• 4 cutting edges per insert, single-sided, neutral hand orientation
• Positive rake angle with T-Land cutting edge style for controlled chip formation
• ME16 chip breaker geometry optimized for medium-grain carbide substrate performance
• Wedge clamp insert holding method; compatible with SEKR-12 series cutter bodies

Compatibility

Designed for use with SEKR-12 series toolholders and confirmed compatible with Cutter Series R220.13-12. Rated for steel, stainless steel, superalloys, and titanium workpiece materials (ISO material codes P, M, S).

Installation Notes

Installation is performed by a qualified CNC machinist or tooling technician. Power down and lock out the spindle before seating or replacing inserts. Use the correct torque wrench and wedge clamp hardware specified by the cutter body manufacturer — do not over-torque the clamping mechanism. Inspect the insert pocket and clamp for wear or debris before installing a new insert.