Sandvik Coromant 8019633 Turning Insert Cnmg 12 04 12-MR 4425

Product Description

The SANDVIK COROMANT 8019633 is a CNMG-style indexable turning insert designed for precision metal cutting on CNC lathes and turning centers. It carries the ISO designation CNMG 12 04 12-MR 4425 and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN over a solid carbide substrate. The MR chip breaker geometry is optimized for medium roughing operations. With a 0.5000-inch inscribed circle and a 0.0469-inch corner radius, this insert delivers controlled chip formation and consistent tool life in steel turning applications. It is installed by machinists and CNC tooling technicians in production and job-shop environments.

This insert is engineered primarily for cutting steel, classified under ISO P workpiece material, making it well suited for general-purpose and medium-duty external turning, facing, and profiling passes. The neutral hand orientation allows use in standard right-hand toolholders configured for CNMG inserts. The 4425 grade provides a balance of wear resistance and toughness appropriate for interrupted and continuous cuts in carbon and alloy steels. It fits CNMG-MR series toolholders and is a direct replacement wherever the CNMG 12 04 12-MR 4425 designation is specified.

Key Features

• CVD multilayer coating: TiCN base layer, Al2O3 thermal barrier, TiN outer layer for wear indication
• MR chip breaker geometry suited for medium roughing passes in steel
• 0.0469-inch corner radius balances edge strength and surface finish
• Neutral hand insert compatible with standard CNMG clamp and screw-lock toolholders
• ISO P primary classification targets carbon steel and alloy steel workpieces
• Solid carbide substrate provides dimensional stability at elevated cutting temperatures

Compatibility

Designed as a direct-fit replacement for any toolholder accepting CNMG 12 04 12 inserts with clamp or screw holding method. Compatible with CNMG-MR series toolholders per ISO and ANSI insert seating standards. Primary workpiece material is steel (ISO P); secondary application covers ISO K materials per manufacturer classification.

Installation Notes

CNMG turning inserts are seated and secured by a licensed machinist or CNC tooling technician. Before indexing or replacing an insert, power down the spindle and confirm the machine is in a locked-out, zero-energy state per OSHA lockout/tagout procedures. Use the correct torque wrench and manufacturer-specified seating screw to avoid cracking the carbide or distorting the insert pocket. Do not exceed the toolholder's recommended depth-of-cut or feed-rate envelope for this insert geometry.