Hertel H08704090 Threading Insert 36 Tpi 1/4 in Ic

Product Description

The HERTEL H08704090 is a solid carbide laydown threading insert designed for right-hand internal UN thread cutting at 36 threads per inch (TPI). Built to insert style 11IR, this insert features a TiC/TiN multilayer coating that improves wear resistance and extends tool life in demanding threading applications. It carries a 1/4-inch inscribed circle and measures 0.127 inches in thickness, with a relief angle of 0 degrees. Manufactured to the HG330TR grade, it suits precision threading operations where consistent thread form and surface finish are required. HVAC, plumbing, and general mechanical contractors rely on inserts like this for internal threading on pipe fittings, valves, and machined components.

This insert is suited for internal threading on UN-standard fastener and fitting profiles in both production and maintenance machining environments. It is appropriate for use in CNC lathes and manual threading setups where a laydown-style insert seat is specified. The 36 TPI designation targets fine-pitch threading applications common in instrument fittings, hydraulic connectors, and precision mechanical assemblies. Each package contains one insert, with a minimum order quantity of 10 units.

Key Features

• Solid carbide construction with TiC/TiN coating for extended wear life
• 36 TPI for fine-pitch UN internal threading
• 1/4-inch inscribed circle fits standard 11IR toolholders
• 0.127-inch insert thickness for consistent seating depth
• Right-hand cutting geometry for standard lathe threading passes
• HG330TR grade optimized for steel and general-purpose threading materials

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting 11IR-style laydown threading inserts with a 1/4-inch inscribed circle and 0.127-inch thickness seating requirement.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with indexable insert toolholders. Power down and lock out the machine spindle before seating or replacing inserts. Ensure the insert pocket is clean and free of chips before clamping to maintain proper seating. Follow the toolholder manufacturer torque and clamping recommendations for 11IR-style inserts.