Hertel 11IR20UNHG225TR Threading Insert 20 Tpi 1/4 in Ic

Product Description

The HERTEL 11IR20UNHG225TR is a solid carbide laydown threading insert designed for internal UN thread cutting at 20 threads per inch. Manufactured in grade HG225TR and finished with a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability in demanding threading operations. It features a 1/4 inch inscribed circle and a thickness of 0.127 inches. The right-hand orientation suits standard internal threading setups on CNC lathes and manual turning centers. Machinists and toolroom professionals install this insert into compatible 11IR-style toolholders for single-point threading passes on ferrous and non-ferrous workpieces.

This insert is suited for internal thread cutting applications requiring UN thread form at 20 TPI in production and job-shop environments. It is used in residential and commercial machine shops where tight thread tolerances and consistent surface finish are required on bored or drilled features. The TiAlN coating supports cutting at elevated surface speeds, and the solid carbide substrate resists deformation under intermittent and continuous threading loads. Applications include threading of hydraulic fittings, fastener bores, and precision mechanical assemblies.

Key Features

• Solid carbide substrate for rigidity and edge retention in threading passes
• TiAlN coating applied via PVD process for heat and wear resistance
• Right-hand internal UN thread form at 20 threads per inch
• 1/4 inch inscribed circle fits standard 11IR-style toolholders
• 0.127 inch thickness for stable seating in laydown insert pockets

Compatibility

Designed as an OEM-style replacement and standard fit for 11IR-style laydown threading toolholders accepting a 1/4 inch inscribed circle insert with UN internal thread geometry.

Installation Notes

This insert is installed by qualified machinists or toolroom technicians on CNC or manual turning equipment. Power down and lock out the machine spindle before changing inserts. Seat the insert fully in the toolholder pocket and torque the clamping screw according to the toolholder manufacturer specifications. Inspect the cutting edge and pocket seating surface before resuming threading operations.