Sandvik Coromant 7861103 WNMG431-QM Turning Insert

Product Description

The SANDVIK COROMANT 7861103 is a WNMG431-QM 4425 grade solid carbide turning insert designed for external turning operations on steel and cast iron workpieces. It carries a CVD-applied multilayer coating of Al2O3, TiCN, and TiN that provides thermal resistance and wear protection at the cutting edge. The insert features an 80-degree trigon shape (W) with a neutral hand orientation and a 0.40 mm corner radius. The QM chip breaker geometry is engineered for medium turning conditions, helping to control chip formation and reduce cutting forces. Licensed machinists and CNC lathe operators in production and job-shop environments will find this insert suited to general-purpose steel turning and cast iron finishing applications.

This insert is intended for use in the SANDVIK COROMANT T-Max P series tooling system. It fits standard WNMG style holders and is applicable in both roughing and semi-finishing passes on steel (ISO P) and cast iron (ISO K) materials. The 0.5-inch inscribed circle diameter and 3/16-inch insert thickness make it compatible with medium-to-large turning tool bodies designed for WNMG 08 04 04 inserts. Typical applications include shaft turning, facing, and profiling on CNC lathes and turning centers in industrial and production environments. The ISO industry standard designation is WNMG 08 04 04-QM 4425.

Key Features

• CVD-coated with Al2O3, TiCN, and TiN layers for extended tool life in steel and cast iron
• 80-degree trigon insert shape with 6 usable cutting edges for cost-effective indexing
• 0.40 mm corner radius for balanced edge strength and surface finish capability
• QM chip breaker geometry suited to medium turning with controlled chip evacuation
• Neutral hand orientation fits standard WNMG right- and left-hand holders
• Clamp and screw holding method compatible with T-Max P series toolholders

Compatibility

Designed for use with SANDVIK COROMANT T-Max P series WNMG-style turning toolholders. ISO insert designation WNMG 08 04 04-QM 4425 confirms fitment with any holder specifying the WNMG 08 04 04 insert seat. Primary workpiece material is steel (ISO P); secondary workpiece material is cast iron (ISO K).

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician with the machine in a full stop and lockout-tagout procedures applied before indexing or replacing inserts. Use the appropriate torx or hex key as specified by the toolholder manufacturer when tightening the clamping screw or pin-lock to secure the insert. Inspect the insert pocket and clamping components for wear or debris before seating the new insert. Do not exceed the recommended depth of cut or feed rate range for the 4425 grade as defined in the applicable SANDVIK COROMANT tooling guide.