Seco 74070253 Turning Insert CNMP432-M1-36 883 Carbide

Product Description

The SECO 74070253 is a solid carbide, uncoated turning insert in the CNMP-M1 series, designed for precision metal cutting on CNC lathes and turning centers. It carries an 80-degree diamond shape (Insert Shape Code C), a neutral hand orientation, and a negative rake geometry. The inscribed circle measures 0.5 inches, the corner radius is 0.0315 inches (1/32 inch), and the insert thickness is 0.1874 inches. Manufacturer grade 883 is a fine-grain, uncoated carbide substrate engineered specifically for the high-heat, work-hardening demands of superalloys and titanium. The M1 chip breaker geometry and honed cutting edge support stable chip formation in demanding applications.

This insert is suited for boring, facing, and turning operations in aerospace, power generation, and industrial manufacturing environments where superalloys and titanium are the primary workpiece materials. Secondary workpiece material codes M, K, N, and H indicate additional suitability for steel, cast iron, non-ferrous metals, and hardened materials. The insert accommodates a maximum depth of cut of 0.4764 inches and is compatible with clamp, pin, and lever-lock holding methods, making it adaptable to a range of standard toolholders used in production and job-shop turning setups.

Key Features

• 80-degree diamond insert shape (CNMP) with negative rake for strong cutting edge geometry
• Uncoated 883-grade solid carbide substrate optimized for superalloys and titanium (material grade S10, S20, S30)
• M1 chip breaker with honed cutting edge for controlled chip evacuation and reduced edge buildup
• Four cutting edges per insert for extended tool life and cost efficiency
• Compatible with clamp, pin, and lever-lock toolholder systems
• Conforms to ANSI and ISO standards; ISO equivalent code CNMG120408-M1

Compatibility

This insert conforms to ANSI and ISO standards under industry standard number CNMP432-M1 and ISO code CNMG120408-M1. It is designed for use in standard CNMP-style toolholders that accept clamp, pin, or lever-lock insert retention. Verify toolholder bore diameter compatibility with the 0.2028-inch hole diameter before installation.

Installation Notes

Turning insert replacement is performed by qualified machinists or toolroom technicians. Power down and de-energize the machine, engage the spindle lock, and relieve any residual coolant pressure before accessing the toolholder. Use the appropriate torque wrench and manufacturer-specified clamp hardware to seat the insert; do not overtighten the clamping screw by feel alone. Inspect the insert pocket and seating surface for chips or debris before installing a new insert to ensure proper contact and edge alignment.