Iscar 5901925 Threading Insert 2.50mm Iso IC908 Carbide

Product Description

The ISCAR 5901925 is a laydown-style threading insert designed for internal ISO thread cutting on CNC lathes and turning centers. Built from solid carbide in the IC908 grade with a PVD-applied TiAlN coating, it handles a wide range of workpiece materials including steel, stainless, cast iron, non-ferrous alloys, and heat-resistant superalloys. The insert is configured for right-hand cutting with a 2.50 mm ISO pitch, a 3/8 inch (9.53 mm) inscribed circle, and a thickness of 0.143 inches. It fits the 16IR insert style and is part of the ISCARTHREAD series, suited for precision threading operations where consistent thread form and tool life are priorities.

This insert is intended for internal threading passes in production and job-shop turning environments. It suits residential and industrial CNC turning applications where ISO metric thread profiles at 2.50 mm pitch are required. The IC908 grade and TiAlN coating make it a general-purpose choice across multiple material groups, coded H, K, M, N, P, and S under ISO workpiece classification. Machinists and CNC operators working on threaded bores, nuts, and internally threaded components will find this insert applicable to a broad range of turning fixtures and toolholders accepting the 16IR form factor.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life across universal workpiece materials
• Right-hand internal ISO thread form at 2.50 mm pitch
• 16IR insert style with 3/8 inch inscribed circle for use in compatible toolholders
• Laydown insert geometry for stable seating and repeatable thread form
• Corner radius of 0.15 mm (0.0059 inches) for precise thread root profile
• Compliant with ISO 13399 cutting tool data representation standards

Compatibility

Designed as an OEM-style replacement or standard supply insert for 16IR internal threading toolholders accepting a 3/8 inch inscribed circle laydown insert with ISO thread form geometry.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the toolholder is secured before seating or replacing the insert. Use the appropriate torque wrench for the clamping screw to avoid insert movement or fracture during cutting. Verify toolholder compatibility with the 16IR insert style and confirm thread pitch programming matches the 2.50 mm pitch of this insert before running.