Seco 03276272 Turning Insert DNMG432-M3 TP25 Carbide

Product Description

The SECO 03276272 is a DNMG432-M3 series indexable turning insert manufactured from solid carbide with a multilayer CVD coating of TiCN and Al2O3. It features a 55-degree diamond shape, neutral hand orientation, and the M3 chip breaker geometry. The insert carries a TP25 manufacturer grade, placing it in the P20, P25, P30, and P35 material grade range. With four usable cutting edges and a chamfered and honed cutting edge style, it delivers consistent performance in production turning environments. The insert holds to ISO and ANSI tolerance and style standards under the DNMG code designation.

This insert is intended for external and internal turning operations including back turning, boring, facing, and straight turning. Its primary workpiece material is steel, with secondary compatibility for stainless steel and cast iron. The M3 chip breaker geometry suits medium-depth roughing and semi-finishing passes. It is installed and used by CNC machinists and toolroom technicians on lathes and turning centers. The ISO code equivalent is DNMG150408-M3, which can be used to cross-reference toolholder compatibility.

Key Features

• DNMG432-M3 geometry with 55-degree diamond insert shape and negative rake angle
• CVD multilayer TiCN and Al2O3 coating for wear resistance on steel and stainless steel
• TP25 grade (P20/P30/P35 range) suitable for medium to heavy steel turning
• Four cutting edges per insert for extended tool life per unit
• M3 chip breaker designed for back turning, boring, facing, and general turning
• Compatible with clamp, pin, and lever-lock toolholder holding methods

Compatibility

Designed for use in DNMG-style toolholders that accept a 1/2-inch inscribed circle, 55-degree diamond insert with a 0.2028-inch hole diameter. Compatible holding methods include clamp, pin, and lever-lock systems. ISO code DNMG150408-M3 can be used to match compatible toolholders across manufacturers. Multi-use application includes back turning, boring, facing, and turning operations.

Installation Notes

Installation is performed by CNC machinists or toolroom technicians following the toolholder manufacturer's clamping torque specifications. Ensure the machine spindle is fully stopped and locked out before indexing or replacing inserts. Seat the insert fully against the toolholder pocket before engaging the clamp, pin, or lever-lock mechanism. Inspect the insert pocket and seating surfaces for chips or debris before installation to avoid insert rocking or premature edge failure.