Hertel 16IR14UNJHG225T Threading Insert 14 Tpi 3/8 Ic

Product Description

The HERTEL 16IR14UNJHG225T is a solid carbide laydown threading insert designed for internal UNJ thread cutting at 14 threads per inch. Manufactured to the HG225TR grade, the insert features a Physical Vapor Deposition (PVD) TiAlN coating that improves wear resistance and tool life in demanding threading operations. With a 3/8 inch (0.3750 inch) inscribed circle and a thickness of 0.1460 inches, this right-hand insert seats securely in compatible 16 IR style toolholders. It is intended for use by machinists and tooling specialists working with precision threaded components in aerospace, defense, and industrial manufacturing environments.

This insert is suited for internal threading applications where UNJ thread forms are required. UNJ threads incorporate a controlled root radius that increases fatigue strength compared to standard UN threads, making them common in aerospace and high-stress mechanical assemblies. The right-hand cutting geometry is appropriate for conventional internal threading passes on CNC lathes and manual turning centers. The TiAlN PVD coating supports performance in a range of workpiece materials including alloy steels and stainless steels.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision threading
• TiAlN PVD coating enhances tool life and thermal resistance
• Internal UNJ thread form with controlled root radius for fatigue-critical applications
• 14 TPI cutting geometry for consistent thread pitch accuracy
• Right-hand cutting orientation for standard internal threading operations
• 16 IR laydown insert style for positive seating in compatible toolholders

Compatibility

Designed as an OEM-style replacement or standard tooling insert for use in 16 IR style internal threading toolholders configured for laydown insert geometry.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secured before seating or replacing the insert. Use the appropriate torx or clamp screw driver specified by the toolholder manufacturer to achieve proper clamping without over-torquing. Verify insert orientation and thread direction before commencing any cutting operation.