Sandvik Coromant 7859228 Turning Insert CNMG642-PM 4415

Product Description

The SANDVIK COROMANT 7859228 is a CNMG-style indexable turning insert in the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. Manufactured from solid carbide and CVD-coated with a multilayer TiCN, Al2O3, and TiN stack, this insert delivers thermal wear resistance and crater resistance across a wide range of cutting conditions. The 80-degree diamond shape provides a strong cutting edge geometry suited to moderate to heavy stock removal. It carries a 0.79 mm (0.0313 inch) corner radius and a 19.05 mm (0.75 inch) inscribed circle, fitting standard CNMG toolholders. Licensed machinists and CNC operators install this insert in production and job-shop turning applications.

The 7859228 is suited for turning cast iron and steel workpieces, as indicated by its primary ISO material classification K and secondary classification P. The PM chipbreaker geometry is optimized for medium to finishing passes, helping control chip formation and reducing built-up edge. Typical applications include shaft turning, facing, and profiling on ferrous materials in both high-volume production and lower-volume precision work. The neutral hand orientation allows use in standard right-hand and left-hand toolholder setups without repositioning.

Key Features

• CVD multilayer coating: TiCN plus Al2O3 plus TiN for combined wear and thermal resistance
• 80-degree diamond insert shape (ISO shape code C) for strong edge geometry and versatile entry angles
• PM chipbreaker geometry for controlled chip evacuation on medium to finishing cuts
• Manufacturer grade 4415 targeting ISO K (cast iron) primary and ISO P (steel) secondary workpiece materials
• Compatible with clamp and screw insert-holding methods for secure seating in CNMG toolholders
• Neutral hand orientation for use in standard right-hand or left-hand turning setups

Compatibility

Designed as a direct-fit replacement for standard CNMG 19 06 08 toolholder pockets using clamp or screw holding methods. ISO designation CNMG 19 06 08-PM 4415 confirms fitment in any toolholder rated for that insert seat geometry.

Installation Notes

Insert replacement and indexing should be performed by a qualified machinist or CNC setup technician with the machine in a full stop, spindle off, and all axes at a safe position. Inspect the toolholder pocket and clamp for wear, chips, or debris before seating the new insert. Torque the clamp or screw to the toolholder manufacturer's specification only — do not estimate. Confirm insert seating and runout before resuming cutting operations.