Sandvik Coromant 7859048 Turning Insert CNMG433-PM 4415

Product Description

The SANDVIK COROMANT 7859048 is a CNMG-style indexable turning insert designed for general turning operations on CNC lathes and turning centers. It carries the manufacturer grade designation 4415 and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability during continuous and interrupted cuts. The insert has an 80-degree diamond shape, a neutral hand orientation, a 0.5000-inch inscribed circle, and a 1.19 mm corner radius. With four cutting edges per insert, it delivers consistent cost-per-edge economics in production turning environments. It belongs to the T-Max P series, a platform engineered for steel and cast iron turning applications.

This insert is suited for turning steel as its primary workpiece material and cast iron as its secondary workpiece material. Typical applications include external and internal diameter turning, facing, and light roughing to finishing operations in both high-volume production and job-shop settings. The PM chip breaker geometry controls chip formation across a broad range of feeds and depths of cut, making it a practical choice for medium-duty turning passes on a variety of ferrous components. Licensed machinists and CNC operators install this insert in commercial and industrial machining environments.

Key Features

• CVD-applied TiCN, Al2O3, and TiN multilayer coating for extended tool life on steel and cast iron
• 80-degree diamond insert shape (CNMG style) with four usable cutting edges per insert
• 1.19 mm corner radius balances surface finish quality with edge strength
• PM chip breaker geometry suited for medium-duty turning with reliable chip control
• Compatible with clamp and screw insert holding methods
• ISO code CNMG 12 04 12-PM 4415 for straightforward cross-referencing

Compatibility

Designed for use in CNMG-style insert toolholders that accept a 0.5000-inch inscribed circle, 3/16-inch thick diamond insert with a 0.2030-inch hole diameter and a clamp or screw holding method, consistent with CNMG 1204-series toolholder seats.

Installation Notes

This insert is installed by qualified machinists or CNC operators following standard indexable tooling procedures. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque driver for the clamping screw to avoid insert seat damage or screw shear. Inspect the insert pocket and seat for wear or debris before seating a new cutting edge.