Seco 03096303 CNMG431-MF3 TP3501 Carbide Turning Insert

Product Description

The SECO 03096303 is a CNMG431-MF3 series indexable turning insert engineered for general-purpose metal cutting in CNC and manual lathe applications. Manufactured from solid carbide with a CVD-applied Duratomic coating system of TiCN, Al2O3, and Cr layers, this insert delivers thermal resistance and edge stability across a range of steel and stainless steel workpiece materials. The insert features a 0.5 inch inscribed circle, a 1/64 inch (0.0157 inch) corner radius, and an 80-degree diamond shape with a negative rake geometry. Four usable cutting edges and the MF3 chip breaker profile make this a cost-efficient choice for medium-duty turning, facing, and boring operations.

This insert is rated for primary use on steel (ISO material code P, grades P20, P30, and P40) and secondary use on stainless steel (ISO code M). Typical applications include external and internal turning, shoulder facing, and boring on lathes and turning centers in both job-shop and production environments. The MF3 chip breaker is optimized for medium feed rates and provides reliable chip control in continuous-cut conditions. Licensed machinists, CNC programmers, and toolroom technicians will find this insert suitable for a broad range of component materials in these categories.

Key Features

• CVD Duratomic coating: TiCN, Al2O3, and Cr layers for heat resistance and wear life
• MF3 chip breaker with chamfered and honed cutting edge for controlled chip flow at medium feeds
• Four cutting edges per insert for extended tool economy
• 80-degree diamond insert shape (code C) with negative rake and N clearance for secure clamping
• Compatible with clamp, pin, and lever-lock toolholders
• Multi-use geometry supports turning, facing, and boring from a single insert style

Compatibility

Designed as an OEM-style replacement insert for CNMG-style toolholders that accept a 0.5 inch inscribed circle, 3/16 inch thick diamond-80 insert with a 0.2028 inch hole diameter. Conforms to ANSI and ISO standards; ISO designation CNMG120404-MF3. Industry standard number CNMG431-MF3.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified clamping hardware for the toolholder style (clamp, pin, or lever lock) to ensure the insert seats fully against the pocket. Do not exceed the maximum depth of cut of 0.4921 inch without verifying machine rigidity and workholding stability.