Hertel H08715161 Threading Insert 11.5 Tpi Npt Carbide

Product Description

The HERTEL H08715161 is a laydown threading insert designed for cutting internal NPT threads on a lathe or CNC turning center. Built from solid carbide with a TiC/TiN coating, it delivers hard, wear-resistant cutting edges suited to steel, stainless, and cast iron workpieces. The insert profiles at 11.5 threads per inch, matching the NPT standard taper thread pitch used on pipe fittings and valves. It carries an inscribed circle of 0.375 inches and a thickness of 0.146 inches, fitting standard 16ER toolholders. The HG630TR grade provides a balance of toughness and heat resistance for interrupted and continuous threading passes.

This insert is used in production and job-shop turning operations where internal NPT pipe threads are required. Typical applications include threading pipe couplings, valve bodies, hydraulic fittings, and manifold ports. The right-hand cutting geometry suits standard lathe rotation for internal threading cycles. Machinists, CNC operators, and tool-and-die professionals working with pipe-thread components are the primary users. Sold individually per package with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate for wear resistance in ferrous and non-ferrous threading
• TiC/TiN multilayer coating reduces heat buildup and extends edge life
• 11.5 TPI pitch matches NPT pipe thread standard
• Right-hand internal threading geometry for standard boring-bar setups
• 16ER insert style fits a wide range of compatible laydown threading toolholders
• Relief angle of 0 degrees provides full-profile thread form support

Compatibility

Designed for use in 16ER-style laydown threading toolholders configured for internal NPT thread applications at 11.5 TPI.

Installation Notes

Installation is performed by machinists or CNC operators following standard insert-seating procedures for laydown threading toolholders. Ensure the machine spindle is at a complete stop before changing inserts, and use the correct torx or clamp screw torque per the toolholder manufacturer's specification. Verify insert seating and clamp engagement before running the threading cycle. Always confirm thread pitch and taper compliance with a calibrated NPT thread gauge after cutting.