Hertel H08708398 Threading Insert 8 Tpi 3/8 Inch Ic

Product Description

The HERTEL H08708398 is a laydown threading insert designed for right-hand internal UN thread cutting operations. Built from solid carbide with a TiC/TiN coating, it delivers the hardness and wear resistance required for precision threading in production and job-shop environments. The insert carries an inscribed circle of 3/8 inches and a thickness of 0.146 inches. It runs at 8 threads per inch (TPI) and is suited for machinists and CNC operators working with unified national thread standards on internal bores.

This insert is applied in metal cutting operations where consistent UN internal thread form and surface finish are critical. The 16IR insert style and HG330TR grade make it a fit for CNC lathes and turning centers performing internal threading passes on steel, alloy, and similar workpiece materials. It is typically installed in compatible laydown threading toolholders used in production turning, contract machining, and maintenance repair environments where thread quality and insert repeatability matter.

Key Features

• Solid carbide construction for high hardness and extended tool life in threading applications
• TiC/TiN coating provides wear resistance and reduced friction during thread cutting
• 8 TPI for standard unified national internal thread profiles
• Right-hand cutting geometry for conventional internal thread direction
• 3/8 inch inscribed circle fits standard 16IR laydown toolholders
• Zero relief angle laydown design for secure, repeatable seating in the pocket

Compatibility

Designed as an OEM-style replacement threading insert for 16IR-style laydown threading toolholders configured for internal UN thread applications.

Installation Notes

Installation is performed by machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the toolholder is secured before seating or replacing the insert. Use the correct torx or clamp screw driver specified by the toolholder manufacturer to avoid stripping the clamping pocket. Verify insert orientation and thread form match the workpiece thread standard before beginning a threading pass.