Sandvik Coromant 8019551 Turning Insert Tpmr 11 03 04 4425

Product Description

The SANDVIK COROMANT 8019551 is a solid carbide turning insert in the TPMR series, designed for precision metal-turning operations on CNC lathes and turning centers. This insert carries the ISO designation TPMR 11 03 04 4425 and features a multi-layer CVD coating — TiCN, Al2O3, and TiN — engineered to resist wear and extend tool life when cutting steel. The triangular insert shape (code T) has an inscribed circle of 0.25 inches and a corner radius of 0.0156 inches, making it well suited for finishing and light semi-finishing passes where tight tolerances and surface finish quality matter. Machinist and CNC operators working in job shops and production environments are the primary users.

This insert is intended for primary use on steel workpieces, with a secondary application in materials classified under ISO material group K. The TPMR insert style features a neutral hand orientation and a clamp-type holding method, fitting standard TPMR-style toolholders. The relief angle of 11 degrees reduces cutting forces and minimizes workpiece deflection, which is particularly useful in finishing operations. The 4425 manufacturer grade designation indicates a wear-resistant substrate and coating combination optimized for continuous and lightly interrupted cuts on carbon and alloy steels.

Key Features

• CVD-applied multi-layer coating: TiCN, Al2O3, TiN for extended wear resistance on steel
• Triangular insert shape with 0.0156-inch corner radius for finishing and light semi-finishing
• 0.25-inch inscribed circle; insert thickness 0.125 inches
• Neutral hand orientation — compatible with both left- and right-hand setups
• Clamp-type holding method with tolerance code M and clearance code P
• Chip breaker designation 53 for controlled chip evacuation during steel cutting

Compatibility

Designed for use in TPMR-style clamp toolholders accepting a triangular insert with a 0.25-inch inscribed circle. Verify toolholder seat geometry, pocket configuration, and clamping style before installation. No specific machine or toolholder model numbers were provided in the product data.

Installation Notes

Insert replacement should be performed by a qualified machinist or CNC tooling technician with the machine fully stopped and the spindle locked out per facility lockout/tagout procedures. Use the appropriate torque wrench and manufacturer-specified clamping hardware to seat the insert securely — do not overtighten the clamp screw by hand estimation alone. Inspect the toolholder pocket and clamp for wear or debris before seating the new insert. Follow applicable shop safety and OSHA machine guarding requirements when resuming cutting operations.