Sandvik Coromant 5724359 Turning Insert CNMG431-MF 1125

Product Description

The SANDVIK COROMANT 5724359 is a CNMG431-MF 1125 series turning insert designed for external turning operations on CNC lathes and turning centers. Built from solid carbide and coated with TiAlN and AlCr2O3 via a PVD coating process, this insert delivers wear resistance and thermal stability during interrupted and continuous cuts. The 80-degree diamond insert shape (Shape Code C) provides a strong cutting edge geometry. With a 0.5-inch inscribed circle, a 0.492-inch insert length, and a 3/16-inch insert thickness, this is a precision-ground indexable insert suitable for high-volume production turning. It is held with a clamp and pin method and features four usable cutting edges per insert.

This insert is engineered primarily for cutting steel, with secondary suitability for stainless steel, superalloys, and titanium. The MF chip breaker geometry is optimized for light to medium-depth finishing passes where chip control and surface finish are priorities. ISO code CNMG 12 04 04-MF 1125 identifies it within the T-Max P series, a platform common in production turning environments. Typical users include CNC machinists and toolroom technicians working on precision turned components in automotive, aerospace, and general manufacturing applications.

Key Features

• Carbide substrate with TiAlN and AlCr2O3 PVD coating for extended tool life in steel cutting
• MF chip breaker geometry optimized for finishing cuts and controlled chip evacuation
• 80-degree diamond insert shape (CNMG) provides a strong nose with good versatility in turning operations
• Four cutting edges per insert maximize cost-per-edge value
• Neutral hand orientation suits both left- and right-hand toolholders
• Clamp and pin holding method ensures secure seating under interrupted cut conditions

Compatibility

Designed for use in CNMG-style indexable toolholders with clamp and pin retention, compatible with the SANDVIK COROMANT T-Max P turning system. This insert follows ISO designation CNMG 12 04 04-MF 1125 and fits any toolholder conforming to CNMG 431 insert pocket specifications.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and clamping screw to secure the insert per the toolholder manufacturer seating specifications. Inspect the insert pocket and seating surfaces for chips or debris before installing a new edge to ensure proper support and prevent premature edge failure.