Seco 03093939 TNMG432-M5 TP3501 Carbide Turning Insert

Product Description

The SECO 03093939 is a TNMG432-M5 triangular solid carbide turning insert designed for precision metal cutting in production turning applications. Manufactured to grade TP3501 with a Duratomic CVD-applied multilayer coating of TiCN, Al2O3, and Cr, this insert delivers thermal resistance and wear performance suited to steel and stainless steel machining. It features a negative rake geometry with a neutral hand orientation, a 0.5000-inch inscribed circle, and a 0.0315-inch corner radius. With six cutting edges per insert and a chamfered and honed cutting edge style, it offers extended tool life in medium to heavy roughing and semi-finishing passes. Licensed machinists and CNC turning specialists install this insert on toolholders compliant with ANSI and ISO standards.

This insert is engineered for back turning, boring, facing, and turning operations on steel (ISO material code P) and stainless steel (ISO material code M), covering material grades P20, P30, and P40. It suits typical CNC lathe and turning center applications in both job shop and production environments where consistent chip control is required. The M5 chip breaker geometry manages chip flow across a broad range of depths of cut up to 0.7874 inches, making it suitable for interrupted cuts and moderate feed rates on ferrous workpieces.

Key Features

• Duratomic CVD multilayer coating (TiCN, Al2O3, Cr) for thermal stability and crater wear resistance
• Six cutting edges per insert for reduced cost per edge
• M5 chip breaker geometry supports back turning, boring, facing, and turning
• Chamfered and honed cutting edge style for edge strength and smooth entry
• Compatible with clamp, pin, and lever lock toolholder holding methods
• Negative rake, neutral hand — fits standard TNMG-series toolholders

Compatibility

Designed for use in TNMG-series toolholders accepting inserts with a 0.2028-inch hole diameter and compliant with ANSI and ISO mounting standards. Industry standard number TNMG432-M5; ISO code TNMG220408-M5. Suitable for clamp, pin, and lever lock holding methods.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before seating or indexing the insert. Use the correct torque driver for the clamping screw to avoid insert cracking — refer to the toolholder manufacturer's specified clamping procedure. Inspect the insert pocket and seating surfaces for chips or debris before each insert change.