Sandvik Coromant 8019690 Turning Insert Tnmg 27 06 08-QM 4425

Product Description

The SANDVIK COROMANT 8019690 is a solid carbide turning insert in the TNMG-QM series, carrying ISO designation TNMG 27 06 08-QM 4425 and ANSI code TNMG542. The insert features a triangular (T) shape with a neutral hand orientation and a negative side clearance. It is coated via CVD process with a TiCN, Al2O3, and TiN multilayer stack, delivering grade 4425 performance characteristics that span high wear-resistance to moderate wear-resistance and toughness. The 0.0313-inch corner radius and QM chip breaker geometry make this insert suited for roughing and medium machining operations on steel workpieces. A licensed machinist or CNC tooling specialist would typically select and install this insert in a compatible TNMG-style toolholder.

This insert is designed primarily for steel (ISO material group P) with secondary application in cast iron (ISO material group K). Its roughing and medium machining chip breaker operation makes it appropriate for high-stock-removal passes and general turning operations on steel components in production or job-shop environments. The grade 4425 substrate and CVD multilayer coating provide the balance of wear-resistance and toughness needed when cutting conditions vary or interruptions are present. It is held in the toolholder via clamp or screw mounting methods standard to TNMG-style insert seats.

Key Features

• CVD-applied TiCN, Al2O3, and TiN multilayer coating for extended tool life in steel machining
• Grade 4425 carbide substrate balancing wear-resistance and toughness across roughing and medium machining
• Triangular insert shape with negative side clearance and neutral hand for versatile toolholder compatibility
• 0.0313-inch corner radius suits general-purpose turning profiles
• QM chip breaker geometry optimized for roughing and medium machining chip control
• Compatible with clamp or screw insert-holding methods in TNMG-style seats

Compatibility

Designed for use in TNMG-style toolholders accepting inserts with ISO code TNMG 27 06 08 and ANSI code TNMG542. Compatible holding methods include clamp and screw styles standard to negative-rake triangular insert seats.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. The machine spindle must be fully stopped and the toolholder secured before seating or indexing the insert. Inspect the insert pocket and clamping components for wear or debris before seating the new insert. Follow the toolholder manufacturer's specified clamping torque and procedure for TNMG-style inserts to ensure proper seating and safe operation.