Seco 03276039 Turning Insert CNMG543-M3 TM2501 Carbide

Product Description

The SECO 03276039 is a CNMG543-M3 indexable turning insert in grade TM2501, designed for medium to heavy material removal in CNC and conventional lathe applications. The insert features a CVD-applied Duratomic multilayer coating of TiCN, Al2O3, and Cr for high wear resistance and thermal stability. The 80-degree diamond shape provides a rigid cutting geometry with a negative rake angle of 18 degrees and a chamfered and honed cutting edge, making it well suited to interrupted and continuous cuts on difficult materials. Four usable cutting edges maximize tool life per insert, and the M3 chip breaker geometry controls chip flow during moderate to heavy feeds.

This insert is intended for boring, facing, and turning operations on stainless steel as the primary workpiece material, with steel as a secondary application. It is compatible with toolholders that accept CNMG-style inserts using clamp, pin, or lever lock holding methods. The neutral hand orientation allows use in both right- and left-hand toolholder configurations. Typical users include CNC machinists and turning-center operators in production and job-shop environments working in material grade classifications M25, M30, and M35 per ISO coding.

Key Features

• CVD Duratomic multilayer coating (TiCN, Al2O3, Cr) for wear and heat resistance
• 80-degree diamond insert shape (Shape Code C) with negative rake for strong cutting edge
• M3 chip breaker geometry optimized for medium to heavy feeds on stainless and steel
• Four cutting edges per insert for extended usable tool life
• Compatible with clamp, pin, and lever lock CNMG toolholder systems
• Meets ANSI and ISO standards; ISO code CNMG160612-M3

Compatibility

Designed for CNMG-style toolholders accepting a 5/8-inch inscribed circle insert with a 1/4-inch hole diameter and 1/4-inch insert thickness, using clamp, pin, or lever lock holding methods. Industry standard number CNMG543-M3; ISO equivalent CNMG160612-M3.

Installation Notes

Indexable inserts are seated and secured by qualified machinists or tooling technicians following the toolholder manufacturer's clamping torque and seating procedures. Ensure the toolholder pocket and insert seat are clean and free of chips before seating the insert. Power down and lock out the machine before indexing or replacing inserts. Follow the toolholder manufacturer's specifications for clamping screw torque and lever lock engagement to avoid edge chipping or insert rocking during cutting.