Sandvik Coromant 7859223 Turning Insert CNMG431-PM 4415

Product Description

The SANDVIK COROMANT 7859223 is a CNMG-style indexable turning insert in the T-Max P series, designed for external and general turning operations on CNC lathes and turning centers. This insert is manufactured from solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, providing wear resistance and thermal stability during high-speed cutting passes. It features an 80-degree diamond shape, a 0.5-inch inscribed circle, a 0.40 mm corner radius, and a PM chip breaker geometry. The insert carries a neutral hand orientation and is suited for productive roughing and semi-finishing passes. Installation is handled by licensed machinists and CNC operators in precision metalworking environments.

This insert is optimized for primary use on steel workpieces and performs well on cast iron as a secondary material. The PM chip breaker geometry is engineered to manage chip flow across a broad range of cutting depths and feed rates typical in steel turning applications. With 4 available cutting edges per insert and compatibility with standard CNMG-style toolholders using clamp or screw holding methods, it is a practical choice for production turning cells requiring consistent performance and insert indexability. The ISO code designation is CNMG 12 04 04-PM 4415, and the manufacturers catalog number is CNMG 431-PM 4415.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for heat and abrasion resistance in steel cutting
• 80-degree diamond insert shape (Shape Code C) for rigid, versatile turning geometry
• PM chip breaker geometry suited for general steel turning at varied feeds and depths
• 4 indexable cutting edges per insert for extended tool life value
• Neutral hand orientation compatible with standard CNMG toolholder configurations
• Clamp and screw insert holding method supported

Compatibility

Designed for use in standard CNMG-style toolholders with clamp or screw holding. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K). ISO insert code CNMG 12 04 04-PM 4415.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified clamping hardware when seating the insert to avoid micro-fracture at the cutting edge. Inspect the insert pocket for chips or debris before seating a new edge.