Sandvik Coromant 7861089 SNMG542-QM 4425 Turning Insert

Product Description

The SANDVIK COROMANT 7861089 is a square-shaped carbide turning insert designed for external and internal turning operations on CNC lathes and turning centers. Carrying the ANSI designation SNMG542 and ISO designation SNMG 15 06 08, this insert belongs to the T-Max P series and is manufactured in grade 4425. It features a CVD-applied multilayer coating of Al2O3, TiCN, and TiN, which delivers high wear resistance balanced with adequate toughness for steel machining. The inscribed circle measures 0.625 inches and the corner radius is 0.0313 inches. The QM chip breaker geometry is optimized for roughing and medium machining operations. A licensed machinist or CNC operator installs and services this insert.

This insert is suited for roughing and medium machining of steel workpieces, classified under ISO material group P. The grade 4425 falls in the high wear-resistance to moderate wear-resistance and toughness range, making it a reliable choice for interrupted cuts and continuous passes on carbon and alloy steels. It uses a negative side clearance with a neutral hand orientation, allowing it to fit standard SNMG-style toolholders that accept clamp or screw clamping methods. Typical applications include shaft turning, facing, and profiling operations in general machining environments.

Key Features

• Grade 4425 CVD coating: multilayer Al2O3, TiCN, and TiN for steel turning durability
• QM chip breaker geometry supports both roughing and medium machining passes
• Square insert shape (S) with negative side clearance and neutral hand for versatile mounting
• Inscribed circle of 0.625 inches with 0.0313-inch corner radius
• ANSI insert code SNMG542 and ISO code SNMG 15 06 08 for cross-reference compatibility
• Clamp and screw holding method supported

Compatibility

Designed for use with SNMG-style toolholders that accept clamp or screw clamping, with ANSI size code 542 and ISO size code 150608. Part of the SANDVIK COROMANT T-Max P series. Verify toolholder pocket geometry and clamping method before installation.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and seating tool recommended by the toolholder manufacturer to secure the insert without cracking the carbide substrate. Inspect the insert pocket for debris, damage, or wear before seating a new insert.