Kennametal 1937645 Boring Insert TPGH322 KC5010 Solid Carbide

Product Description

The KENNAMETAL 1937645 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC lathes and machining centers. Manufactured to the TPGH322 insert style, it features a 60-degree triangular shape with an 11-degree relief angle and a 1/32-inch (0.0310-inch) corner radius. The insert carries a KC5010 grade designation and is CVD-coated with a TiC/TiCN/TiN multilayer stack, providing wear resistance and thermal stability at elevated cutting speeds. The 3/8-inch inscribed circle and 0.1270-inch thickness make this insert suited for light-to-medium bore finishing passes where dimensional accuracy is critical.

This insert is intended for use in boring bars and insert holders configured for TPGH-style triangular inserts. It is applied in precision boring of ferrous and non-ferrous materials on production and job-shop CNC turning equipment. The CVD multilayer coating makes it well suited for continuous cuts in steel and cast iron where surface finish and tool life consistency are priorities. Machinists and CNC operators in aerospace, automotive, and general machining environments will find this insert appropriate for tight-tolerance bore work. Each package contains one insert, with a minimum order quantity of five units.

Key Features

• TPGH322 insert style with 60-degree triangular geometry and 11-degree relief angle
• KC5010 grade solid carbide substrate with CVD-applied TiC/TiCN/TiN multilayer coating
• 3/8-inch inscribed circle (0.3750 inches) for compatibility with standard TPGH boring bar holders
• 1/32-inch corner radius (0.0310 inches) supports fine finishing passes with controlled surface contact
• 0.1300-inch hole diameter accommodates standard insert-securing screws on TPGH-style toolholders
• Lightweight at 0.1 pounds per insert, minimizing toolholder imbalance in high-speed applications

Compatibility

Designed as a direct-fit replacement for TPGH322-style boring insert holders and boring bars accepting triangular inserts with a 3/8-inch inscribed circle and standard 0.1300-inch mounting hole diameter.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. The machine spindle must be fully stopped and the turret or toolholder must be de-energized before changing inserts. Use the appropriate Torx or hex key to the insert manufacturer's recommended seating procedure — do not overtighten the clamping screw, as this can fracture the carbide substrate. Verify insert seating and confirm runout with a dial indicator before resuming cutting operations.