Sandvik Coromant 7859043 Turning Insert CNMG432-PM 4415

Product Description

The SANDVIK COROMANT 7859043 is a CNMG432-PM 4415 indexable turning insert from the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. The insert features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN over a solid carbide substrate, providing wear resistance and thermal stability under continuous and interrupted cutting conditions. With an 80-degree diamond insert shape, a 0.5000-inch inscribed circle, and a 0.79 mm corner radius, this insert is suited for medium to semi-finishing passes. It carries a neutral hand orientation and is held by clamp or screw methods. Machinists and CNC operators working in production turning environments are the primary users.

This insert is engineered primarily for steel (ISO material group P) with secondary suitability for cast iron (ISO material group K). The PM chip breaker geometry is optimized for medium-depth finishing and semi-roughing passes where chip control and surface finish consistency are critical. It fits standard CNMG 1204 toolholders and is identified by ISO code CNMG 12 04 08-PM 4415. The T-Max P series is a common platform in high-production turning cells where insert changeout speed and predictable tool life are operational priorities.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for enhanced wear and heat resistance
• 80-degree diamond insert shape (Shape Code C) with 4 cutting edges for maximized tool life per insert
• PM chip breaker geometry suited for medium finishing and semi-roughing on steel and cast iron
• 0.79 mm corner radius balances edge strength with surface finish capability
• Neutral hand orientation fits a wide range of standard CNMG toolholders
• Compatible with clamp and screw insert holding methods

Compatibility

Designed for use in standard CNMG 1204 toolholders. ISO code CNMG 12 04 08-PM 4415 confirms fitment to any toolholder specifying the CNMG 12 04 insert seat. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K).

Installation Notes

Insert seating and replacement should be performed by a qualified machinist or CNC tooling technician with the machine in a full stop and all axes at rest. Inspect the insert pocket and clamping components for wear or debris before seating a new insert. Torque clamping screws according to the toolholder manufacturer specifications only. Discard worn inserts through appropriate carbide recycling channels.