Hertel H08713398 Threading Insert 16IR 11.5 Tpi Npt Carbide

Product Description

The HERTEL H08713398 is a laydown-style threading insert engineered for right-hand internal NPT thread cutting operations. Built from solid carbide with a TiC/TiN multilayer coating, it delivers consistent wear resistance and surface finish on threaded bores. The insert conforms to the 16IR style, carries an 11.5 threads-per-inch (TPI) designation to match standard NPT profiles, and measures a 3/8-inch (0.3750 inches) inscribed circle with a thickness of 0.1460 inches. A zero-degree relief angle suits laydown toolholder seating geometry. This insert is used by machinists and toolroom professionals on CNC lathes and manual threading setups wherever NPT pipe thread forms are required.

This insert targets internal NPT threading applications in both production and job-shop environments. Typical use cases include cutting pipe-thread forms in fittings, manifolds, valve bodies, and fluid-system components where NPT pressure-sealing threads are specified. The solid carbide substrate handles interrupted cuts and harder alloys better than high-speed steel alternatives, making it suitable for stainless steel, alloy steel, and cast iron workpieces common in plumbing, hydraulic, and pneumatic component manufacturing.

Key Features

• Solid carbide substrate for rigidity and extended tool life in difficult-to-machine materials
• TiC/TiN multilayer coating reduces friction and improves wear resistance at the cutting edge
• 16IR laydown insert style for positive seating in compatible laydown threading toolholders
• 11.5 TPI NPT thread form for standard American National Pipe Taper internal thread cutting
• Right-hand cut orientation matches conventional NPT threading direction
• Zero-degree relief angle provides full support across the insert seating surface

Compatibility

Designed for use in laydown-style internal threading toolholders accepting the 16IR insert style. Verify toolholder seat geometry and insert pocket dimensions before installation. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation and use of threading inserts should be performed by qualified machinists following standard turning-center lockout procedures before any insert change. Seat the insert firmly against all toolholder pocket surfaces and torque the clamping screw per the toolholder manufacturer's specification. Inspect the cutting edge for chips or wear before each use, as a damaged edge can produce out-of-tolerance thread forms. Always verify spindle direction and programmed thread pitch against the insert specification before initiating a threading pass.