Iscar 5902008 Threading Insert 40 Tpi Un IC908 Carbide

Product Description

The ISCAR 5902008 is a laydown-style external threading insert designed for cutting Unified National (UN) thread forms at 40 threads per inch (TPI). Manufactured from submicron solid carbide and coated with a PVD-applied TiN/TiAlN finish under the IC908 grade designation, this insert delivers consistent tool life on a wide range of workpiece materials. The right-hand orientation and 16ER insert style make it a standard choice for external threading operations on CNC lathes and turning centers. The inscribed circle measures 3/8 inch (0.3750 inches) with a thickness of 0.1430 inches and a corner radius of 0.0020 inches.

This insert is suited for external threading applications across general machining environments, including production turning of fasteners, fittings, and threaded shafts. The IC908 grade with PVD coating is rated for universal workpiece materials, covering steel, stainless, cast iron, non-ferrous alloys, and high-temperature alloys as indicated by material codes H, K, M, N, P, and S. It fits standard 16ER insert pockets on compatible threading toolholders and is appropriate for both light production and job-shop threading work.

Key Features

• 40 TPI UN external thread form, right-hand cut
• IC908 submicron solid carbide grade with PVD TiN/TiAlN coating
• 16ER insert style with 3/8 inch (0.3750 inches) inscribed circle
• Corner radius of 0.0020 inches for precise thread root geometry
• Chipbreaker style B for controlled chip flow during threading passes
• Conforms to ISO 13399 tooling data standards

Compatibility

Designed to seat in toolholders accepting the 16ER laydown threading insert style. Rated for universal workpiece material categories H, K, M, N, P, and S per the manufacturer grade specification.

Installation Notes

Threading inserts should be installed by a qualified machinist following the toolholder manufacturer seating and torque guidelines. Ensure the machine spindle is fully stopped and the toolholder is secured before insert exchange. Confirm insert orientation matches the required thread hand before starting a threading cycle. Inspect the insert pocket and clamping screw for wear or debris prior to installation to ensure repeatable seating.