Iscar 5902571 Threading Insert 32 Tpi Un Internal IC908

Product Description

The ISCAR 5902571 is a laydown-style carbide threading insert designed for internal UN (Unified National) thread cutting at 32 threads per inch. Built from solid carbide with an IC908 grade designation and a PVD-applied TiAlN coating, this insert is engineered for consistent thread form, wear resistance, and dimensional accuracy on a wide range of workpiece materials. The 16IR insert style mounts in right-hand internal threading toolholders and delivers a 3/8 inch (0.375 inch decimal) inscribed circle with a 0.143 inch thickness. IC908 grade carbide is well suited for demanding threading operations where tool life and surface finish consistency are priorities.

This insert is used in CNC lathes and turning centers for cutting internal UN threads at 32 TPI in applications spanning general-purpose machining, aerospace, and mixed-material production environments. The universal primary workpiece material designation covers carbon steels, stainless steels, cast irons, non-ferrous alloys, and high-temp alloys, making it a versatile choice across job shops and production floors. It is installed by machinists and CNC operators in standard 16IR-compatible internal threading toolholders.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life across diverse workpiece materials
• 32 TPI UN thread standard for unified national internal thread cutting
• Right-hand cut, 16IR laydown insert style for compatibility with standard internal threading holders
• 3/8 inch inscribed circle (0.375 inch decimal) with 0.143 inch thickness
• Corner radius of 0.0016 inch (0.04 mm) for precise thread root geometry
• ISO 13399 compliant tooling data for integration with CAM and tool management systems

Compatibility

Designed for use in 16IR-style internal threading toolholders. Compatible with workpiece material groups H, K, M, N, P, and S per ISO material classification, covering hardened materials, cast iron, stainless steel, non-ferrous, steel, and superalloys.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the machine before seating or replacing inserts. Use the appropriate torx or hex key to the toolholder manufacturer's recommended seating procedure — do not overtighten the clamping screw. Verify insert orientation and hand designation match the toolholder before resuming operation.