Sandvik Coromant 5725412 Turning Insert CNMG642-MM 2025

Product Description

The SANDVIK COROMANT 5725412 is a solid carbide turning insert designed for precision metal cutting in CNC lathe and turning center applications. Manufactured under the T-Max P series, this insert carries grade 2025 with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN for extended tool life and heat resistance at the cutting edge. The insert features an 80-degree diamond shape (CNMG style) with a neutral hand orientation, a 3/4-inch inscribed circle, and a 1/32-inch corner radius. It is sized at 0.7301 inches in length and 1/4 inch in thickness. Installation requires a clamp-and-pin holding method. Tooling professionals and CNC machinists use this insert for demanding cutting operations.

This insert is engineered with a primary focus on stainless steel workpiece materials, making it well suited for applications where built-up edge resistance and thermal stability are critical. The MM chip breaker geometry is designed to control chip formation across a range of depths of cut and feed rates. Typical applications include external turning, facing, and profiling operations on CNC lathes in production and job shop environments. The four available cutting edges maximize value per insert over the service life.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for heat resistance and wear life
• Grade 2025 carbide substrate optimized for stainless steel cutting
• MM chip breaker geometry for controlled chip evacuation at varied feed rates
• 80-degree diamond (CNMG) insert shape provides four usable cutting edges
• Clamp and pin holding method for rigid, repeatable edge positioning
• Neutral hand orientation for versatile toolholder compatibility

Compatibility

Designed for use in CNMG-style toolholders that accept clamp-and-pin retention systems. ISO code CNMG 19 06 08-MM 2025 identifies compatible toolholder families per ISO turning insert standards. Verify toolholder pocket geometry and insert seat dimensions before installation.

Installation Notes

This insert is installed by qualified CNC machinists or tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified fastener when securing the clamping screw to avoid seat damage or insert fracture. Inspect the insert pocket and seating surface for chips or debris before seating a new cutting edge.