Sandvik Coromant 7859050 Turning Insert CNMG433-WMX 4415

Product Description

The SANDVIK COROMANT 7859050 is a CNMG-style turning insert engineered for precision metal-turning applications on CNC lathes and turning centers. This insert features a solid carbide substrate with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, delivering hardness and thermal resistance across a range of workpiece materials. The 80-degree diamond shape (Insert Shape Code C) provides a strong cutting edge geometry, and the 1.19 mm corner radius (0.0469 inch) supports stable chip formation under moderate to heavy cutting conditions. Classified under the T-Max P series, this insert is designed for high-productivity external and internal turning operations where consistent tool life and surface finish control are priorities.

This insert is suited for use in ISO application groups P (steel) and K (cast iron), covering a broad range of general turning scenarios including roughing and semi-finishing on ferrous workpieces. The neutral hand orientation makes it compatible with both right-hand and left-hand toolholders configured for CNMG geometry. Typical users include CNC machinists and tooling technicians in production shops, job shops, and maintenance machining environments. The WMX chip breaker geometry is optimized for medium-range cutting depths and feeds, supporting controlled chip evacuation in continuous and light interrupted cuts.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability
• 80-degree diamond insert shape (Code C) for strong edge strength and versatile entry angles
• 1.19 mm (0.0469 inch) corner radius for balanced surface finish and edge durability
• Neutral hand orientation compatible with standard CNMG toolholders using clamp or screw holding methods
• WMX chip breaker geometry supports medium cutting depths and controlled chip flow
• ISO code CNMG 12 04 12-WMX 4415 for direct cross-reference with toolholder and catalog systems

Compatibility

Designed as an OEM-style replacement turning insert for toolholders accepting CNMG 12 04 insert geometry with clamp or screw holding. ISO code CNMG 12 04 12-WMX 4415 can be used for direct toolholder compatibility verification. Refer to the T-Max P series toolholder documentation for confirmed seating and clamping fit.

Installation Notes

Installation is performed by qualified CNC tooling technicians or machinists. Always index or replace inserts with the machine spindle fully stopped and in a safe, locked state. Use the appropriate torque wrench and insert key specified for the toolholder clamping system to avoid seat damage or insert fracture. Inspect the insert pocket and seating surface for chips or debris before seating the new insert, and confirm secure clamping before resuming cutting operations.