Kennametal 1679773 Threading Insert 48-16 Tpi 1/4 in Ic KC5025

Product Description

The KENNAMETAL 1679773 is a solid carbide laydown threading insert designed for internal partial profile 60-degree thread forms. Carrying the KC5025 manufacturer grade and a PVD-applied TiAlN coating, this right-hand insert handles a thread range of 48 to 16 TPI (0.50 to 1.50 mm pitch) and seats in toolholders sized for an 11NR insert style. The 1/4-inch (6.35 mm) inscribed circle and 3.04 mm thickness match standard laydown pocket geometry. A CB chipbreaker geometry promotes chip control during internal threading passes on CNC lathes and turning centers. Licensed machinists and CNC operators install this insert in production and job-shop environments.

This insert is suited for internal threading operations on CNC lathes, turning centers, and mill-turn machines where a partial profile 60-degree thread form is required. The 48-16 TPI range covers a broad span of unified and metric-equivalent thread pitches, making it a practical choice for shops threading a variety of bore diameters in steel, stainless, and other materials where TiAlN PVD coatings provide thermal and wear resistance.

Key Features

• KC5025 grade solid carbide with PVD TiAlN coating for wear and heat resistance during internal threading
• Right-hand cutting, partial profile 60-degree thread form covering 48-16 TPI (0.50-1.50 mm pitch)
• 11NR insert style with 1/4-inch (6.35 mm) inscribed circle for standard laydown toolholder compatibility
• CB chipbreaker geometry aids chip evacuation in blind and through bores
• 3.04 mm thickness (0.1260 decimal inch) and 3.25 mm hole diameter for secure clamping in pocket
• Corner radius of 0.05 mm (0.0020 decimal inch) for precise thread root geometry

Compatibility

Designed as a direct-fit replacement for 11NR-style laydown threading insert pockets that accept a 1/4-inch inscribed circle. Compatible with right-hand internal threading toolholders specifying the 11NR insert style and a 60-degree partial profile geometry.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified clamping hardware for the toolholder to ensure proper seating of the insert in the laydown pocket. Inspect the pocket and clamping screw for wear or debris before seating a new insert.