Sandvik Coromant 7860574 Turning Insert Tnmg 16 04 04-PM

Product Description

The SANDVIK COROMANT 7860574 is a triangular turning insert in the T-Max P series, designated by ISO code TNMG 16 04 04-PM 4415. It is manufactured from solid carbide and coated via CVD with a three-layer system: TiCN, Al2O3, and TiN. The triangular insert geometry provides 6 usable cutting edges per insert, and the PM chip breaker is engineered for controlled chip formation during steel turning operations. The 0.40 mm corner radius and neutral hand orientation make this insert suitable for a wide range of longitudinal and facing passes on CNC lathes and turning centers. Installation and tool setup are typically performed by machining professionals in metalworking production environments.

This insert is designed primarily for turning steel workpieces, with secondary application in cast iron. The PM chip breaker geometry is optimized for medium-depth finishing and semi-finishing passes where chip control and surface finish consistency are priorities. The T-Max P series is a well-established platform for external and internal turning applications in general machining and production environments. The CVD coating provides thermal resistance and wear protection suited to higher cutting speeds common in steel and cast iron operations.

Key Features

• CVD-applied three-layer coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability
• 6 cutting edges per insert due to triangular shape with neutral hand orientation
• PM chip breaker for reliable chip control in steel and cast iron turning
• 0.40 mm corner radius (0.0156 inch) for medium finishing and semi-finishing cuts
• Clamp and screw insert holding compatibility for secure seating in T-Max P toolholders
• Grade 4415 carbide substrate engineered for primary use on steel workpieces

Compatibility

Designed as an OEM-style replacement insert for SANDVIK COROMANT T-Max P series toolholders accepting TNMG-style inserts. Also cataloged under manufacturer number TNMG 331-PM 4415. Compatible toolholders use clamp or screw insert holding methods with a 3.81 mm (0.150 inch) hole diameter interface.

Installation Notes

Insert replacement should be performed with the machine powered down and all spindle motion fully stopped. Use the appropriate torque wrench and insert-seating tool specified by the toolholder manufacturer when securing via clamp or screw. Inspect the insert pocket and seating surface for chips or debris before installing a new insert. Verify insert orientation and hand designation match the toolholder before initiating a cut.