Hertel H08706392 Threading Insert 16 Tpi Internal Un Carbide

Product Description

The HERTEL H08706392 is a laydown-style threading insert designed for internal UN thread cutting at 16 threads per inch. Built from solid carbide with a TiC/TiN multilayer coating, this insert delivers consistent thread form and extended tool life on ferrous and non-ferrous materials. The 3/8-inch inscribed circle (0.375 inches) and 0.146-inch thickness are matched to standard laydown insert toolholders. Right-hand cutting orientation makes it suitable for conventional internal threading operations on CNC lathes and manual threading equipment. Licensed machinists and toolroom technicians are the primary users of this insert in production and job-shop environments.

This insert is applied to internal threading operations conforming to the Unified National (UN) thread standard. At 16 TPI, it covers common fastener and fitting thread sizes found in general machining, fluid power, and mechanical assembly work. The HG330TR grade with TiC/TiN finish is suited to interrupted cuts and moderate-speed threading passes in steel and cast iron. It is intended for use in standard laydown threading insert holders accepting the 16IR insert style with a zero-degree relief angle seat.

Key Features

• Solid carbide substrate provides rigidity and wear resistance for threading operations
• TiC/TiN multilayer coating extends cutting edge life and reduces built-up edge
• 16 TPI cutting profile for internal UN thread standard
• Right-hand cutting orientation for conventional threading direction
• 3/8-inch inscribed circle fits standard 16IR-style laydown toolholders
• Zero-degree relief angle seat for positive clamping in compatible holders

Compatibility

Designed for use in laydown threading insert holders accepting the 16IR insert style with a zero-degree relief angle and 3/8-inch inscribed circle seating geometry.

Installation Notes

Installation is performed by machinists on CNC or manual lathes with the machine in a powered-down and locked-out state before insert change. Confirm the toolholder accepts the 16IR laydown style and zero-degree relief angle before seating the insert. Use the manufacturer-specified torque procedure for the clamping screw as indicated in the toolholder documentation. Inspect the insert seat and clamping components for debris or wear before each insert change to maintain thread accuracy.