Seco 03273904 CNMG432-MF4 TM2501 Carbide Turning Insert

Product Description

The SECO 03273904 is a CNMG432-MF4 indexable turning insert in the TM2501 grade, designed for precision metal cutting in CNC and manual turning applications. The insert is manufactured from carbide with a CVD-applied Duratomic multilayer coating of TiCN, Al2O3, and Cr, which improves wear resistance and extends tool life in demanding cuts. It features a diamond 80-degree insert shape, a 0.5-inch inscribed circle, a corner radius of 0.0315 inches, and 4 cutting edges per insert. The MF4 chip breaker geometry is suited for finishing and semi-finishing operations. This insert is installed by machinists and CNC operators working in production and job-shop environments.

The SECO 03273904 is intended primarily for turning, facing, and boring of stainless steel and steel workpieces. With a primary workpiece material code of M (stainless steel) and a secondary code of P (steel), it performs across material grades M25, M30, and M35. The MF4 chip breaker and chamfered-and-honed cutting edge style make it well suited for finishing passes where controlled chip formation and surface finish are critical. It accommodates a maximum depth of cut of 0.4756 inches and supports negative rake cutting geometry.

Key Features

• CVD Duratomic multilayer coating: TiCN, Al2O3, and Cr for extended wear resistance
• MF4 chip breaker geometry optimized for finishing and semi-finishing of stainless steel and steel
• 4 cutting edges per insert for maximum cost efficiency
• Compatible with clamp, pin, and lever lock insert holding methods
• Chamfered and honed cutting edge for controlled edge prep and reduced chipping
• Conforms to ANSI and ISO standards with ISO code CNMG120408-MF4

Compatibility

Designed as a direct-fit replacement for toolholders accepting CNMG432 geometry inserts using clamp, pin, or lever lock holding methods. Industry standard number CNMG432-MF4 and ISO code CNMG120408-MF4 apply for cross-reference purposes.

Installation Notes

Installation is performed by qualified machinists or CNC tool-setup personnel. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert firmly in the toolholder pocket and verify the clamping mechanism is fully engaged before resuming operation. Do not run an insert that shows visible chipping, cratering, or deformation on the cutting edge.