Hertel 11IR18UNJHG225T Threading Insert 18 Tpi 1/4 in Ic

Product Description

The HERTEL 11IR18UNJHG225T is a solid carbide laydown threading insert engineered for internal UNJ thread cutting at 18 threads per inch. Featuring a PVD-applied TiAlN coating, it delivers elevated heat resistance and extended tool life in demanding threading operations. The insert has a 1/4 inch inscribed circle and a thickness of 0.127 inches. Right-hand orientation makes it suitable for standard internal threading passes on CNC lathes and turning centers. Machinists and tool-room operators working in aerospace, defense, or precision manufacturing will find this insert appropriate for UNJ thread profiles where controlled root radius is required.

This insert is intended for internal threading applications following the UNJ thread standard, which specifies a controlled radius at the thread root for improved fatigue resistance compared to standard UN profiles. Typical applications include hydraulic fittings, aerospace fastener bores, and precision mechanical assemblies where UNJ thread form compliance is required. The right-hand cutting geometry is suited for conventional internal threading cycles on CNC turning equipment.

Key Features

• Solid carbide substrate provides rigidity and wear resistance in hard and abrasive workpiece materials
• TiAlN coating applied via PVD process improves heat resistance and reduces tool wear at elevated cutting speeds
• 18 TPI UNJ internal thread form with controlled root radius for fatigue-sensitive applications
• 1/4 inch inscribed circle fits standard 11IR-style toolholders
• Right-hand cutting orientation for standard internal threading passes
• Laydown insert style for secure, repeatable seating in compatible toolholders

Compatibility

Designed for use in toolholders accepting 11IR-style laydown threading inserts with a 1/4 inch inscribed circle. Verify toolholder seating and clamping specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with indexable insert toolholders. Power down and lock out the machine spindle before changing inserts. Seat the insert fully and evenly in the toolholder pocket and torque the clamping screw according to the toolholder manufacturer specifications. Inspect the insert seating and edge condition before resuming cutting operations.