Sandvik Coromant 7861031 Cutoff Insert Corocut Qd

Product Description

The SANDVIK COROMANT 7861031 is a carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. Part of the CoroCut QD series, this insert uses a QD-N style seat geometry with a 0.2362-inch cutting width and a neutral lead angle, making it suitable for straight plunge parting. The insert is manufactured from a CVD-coated HC-grade carbide substrate, specifically Manufacturer Grade 4425, with a TiCN/Al2O3/TiN multilayer coating that supports extended tool life in steel and cast iron applications. A licensed machinist or CNC tooling technician installs and indexes this insert as part of a CoroCut QD toolholder assembly.

This insert is used in precision parting and grooving setups on production turning equipment. The neutral hand and neutral lead angle configuration supports center-line parting on most standard lathe setups. The CR chipbreaker geometry promotes controlled chip formation during cutoff operations, reducing the risk of chip packing in the groove. Typical applications include bar stock cutoff, face grooving, and shallow profile grooving in ferrous materials. The 7-degree relief angle provides clearance to minimize rubbing on the workpiece sidewall during deep parting passes.

Key Features

• 0.2362-inch cutting width for consistent parting groove dimensions
• CVD-applied TiCN/Al2O3/TiN coating for wear resistance in steel and cast iron
• HC carbide substrate, Grade 4425, balances toughness and heat resistance
• CR chipbreaker geometry for controlled chip evacuation during cutoff
• 7-degree relief angle reduces sidewall rubbing in deep parting operations
• Neutral lead angle and neutral hand for straightforward plunge parting setups

Compatibility

Designed as an OEM-style replacement insert for SANDVIK COROMANT CoroCut QD series toolholders accepting QD-N style inserts with the K insert size code. ISO designation QD-NK-0600-0004-CR 4425.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct insert clamping key or torque wrench specified by the toolholder manufacturer to seat the insert properly — do not over-tighten by hand. Inspect the insert pocket and clamping surfaces for chips or debris before seating a new insert.