Sumitomo 1NHM946 Turning Insert CCGT21.51EFC AC530U Carbide

Product Description

The SUMITOMO 1NHM946 is a solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. Conforming to ANSI code CCGT21.51EFC and ISO code CCGT060204N-FC, this insert carries a PVD-applied TiAlN and AlCrN dual coating marketed under the Super ZX designation. It features an 80-degree diamond shape with a positive rake angle of 15 degrees, a 7-degree relief angle, and an EFC chip breaker geometry. The insert measures 0.252 inches in length with a 1/4-inch inscribed circle and a 1/64-inch corner radius. It is screw-held and suited for finishing and light turning applications. Licensed machinists and CNC setup technicians are the primary installers.

This insert is primarily intended for finishing cuts on stainless steel workpieces, identified by secondary workpiece material code M. Its positive rake geometry and fine EFC chip breaker promote clean chip evacuation and reduced cutting forces on difficult-to-machine alloys. The CCGT insert style with clearance code C and tolerance code G makes it appropriate for close-tolerance finishing passes where surface finish and dimensional accuracy are critical. It is sold individually per package with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate with PVD-applied TiAlN and AlCrN Super ZX dual coating for heat and wear resistance
• 80-degree diamond insert shape with positive 15-degree rake angle reduces cutting forces on stainless steel
• EFC chip breaker geometry designed for finishing and light turning operations
• Screw-held mounting method for secure, repeatable positioning in compatible toolholders
• Meets ANSI and ISO 13399 standards; ANSI code CCGT21.51EFC, ISO code CCGT060204N-FC
• 7-degree relief angle with tolerance code G for close-tolerance finishing passes

Compatibility

Designed as an OEM-style replacement or standard insert for CNC turning toolholders accepting CCGT-style screw-held diamond inserts with a 0.110-inch hole diameter. Verify toolholder series and insert pocket specifications before ordering.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Always power down and lock out the machine before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-recommended screw to secure the insert in the pocket without overtightening, which can crack the carbide substrate. Handle carbide inserts with care to avoid chipping the cutting edge prior to use.