Sandvik Coromant 7859229 CNMG643-PM 4415 Turning Insert

Product Description

The SANDVIK COROMANT 7859229 is a CNMG-style indexable turning insert from the T-Max P series, designed for external turning operations on CNC lathes and turning centers. It features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN over a solid carbide substrate, grade 4415, providing wear resistance and thermal stability during continuous and semi-interrupted cuts. The insert has an 80-degree diamond shape with a neutral hand orientation, a 0.75-inch inscribed circle, and a 1.19 mm corner radius. It is intended for use by machinists and turning specialists working in production and job-shop environments.

This insert is engineered primarily for turning steel (ISO P workpiece material code) and secondarily for cast iron (ISO K workpiece material code). The T-Max P series is suited for medium to finishing turning passes where consistent surface finish and predictable tool life are required. The PM chip breaker geometry supports chip control across a range of depths of cut and feed rates common in steel turning. Each package contains one insert; the minimum order quantity is 10 units.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear and crater resistance
• Grade 4415 solid carbide substrate optimized for steel and cast iron turning
• 80-degree diamond insert shape (Shape Code C) with neutral hand
• 4 usable cutting edges per insert for extended tooling economy
• PM chip breaker for reliable chip control in medium turning applications
• ISO code CNMG 19 06 12-PM 4415 for cross-reference ordering

Compatibility

Designed for use in CNMG-style turning toolholders that accept a 0.75-inch (19.05 mm) inscribed circle insert with a 0.312-inch hole diameter and clamp or screw holding method. Compatible primary workpiece material is steel; secondary workpiece material is cast iron.

Installation Notes

Installation is performed by a machinist or tooling technician. Ensure the machine spindle is stopped and the turret is locked before indexing or replacing inserts. Seat the insert fully against the pocket locating surfaces and torque the clamp or screw per the toolholder manufacturer's specification. Inspect the insert pocket for chips or debris before seating a new edge to prevent premature fracture or dimensional error.