Iscar 5902041 Threading Insert 18 Tpi Npt IC908 Carbide

Product Description

The ISCAR 5902041 is a laydown threading insert engineered for cutting internal NPT threads at 18 threads per inch (TPI). Built from solid carbide in the IC908 grade and finished with a PVD-applied TiAlN coating, this insert delivers consistent thread form and extended tool life across a wide range of workpiece materials. It carries the 11IR insert style designation with a 1/4 inch (6.35 mm) inscribed circle and a 0.126 inch thickness. The right-hand cutting geometry is configured for internal threading operations on standard NPT pipe thread profiles. Installation and operation are handled by machinists and CNC lathe operators working in metal fabrication, industrial maintenance, and precision machining environments.

This insert is designed for internal NPT pipe threading applications where a consistent 60-degree thread form and leak-resistant taper profile are required. The IC908 carbide grade with TiAlN coating supports use across universal workpiece material groups, including ferrous, non-ferrous, heat-resistant alloys, and stainless steels, as reflected by its material codes H, K, M, N, P, and S. It fits threading toolholders accepting the 11IR insert style and is suited to CNC turning centers and manual lathes equipped for internal threading cycles. Typical applications include threading pipe fittings, couplings, and ported components requiring NPT thread standards.

Key Features

• IC908 solid carbide grade provides high hardness and wear resistance for demanding threading operations
• PVD-applied TiAlN coating reduces friction and extends cutting edge life across varied workpiece materials
• Right-hand internal cutting geometry conforms to NPT taper thread standard
• 18 TPI designation matches standard NPT thread pitch for 1/4 inch and related pipe sizes
• 1/4 inch inscribed circle (6.35 mm) and 0.126 inch thickness conform to 11IR insert geometry
• Compliant with ISO 13399 tool data standards for CAM and tooling system integration

Compatibility

Designed as an OEM-style replacement threading insert for toolholders accepting the 11IR laydown insert style for internal NPT threading applications. No specific compatible model numbers were provided in the product data.

Installation Notes

This insert is seated and secured by a machinist or CNC operator following the toolholder manufacturer's clamping torque and seating procedures. Confirm the toolholder bore and clamping mechanism are clean and free of chips before seating the insert. Verify spindle and coolant systems are powered down before changing inserts. Follow your machine tool manufacturer's programming guidelines for NPT taper threading cycles, including proper infeed angle and lead-in settings.