Iscar 5902178 Threading Insert 18 Tpi 1/4 Inch IC908 Carbide

Product Description

The ISCAR 5902178 is a laydown-style threading insert designed for internal UN thread cutting at 18 threads per inch (TPI). Built from solid carbide with a PVD-applied TiAlN coating and IC908 grade designation, it delivers consistent thread form and wear resistance in a wide range of workpiece materials. The insert features a right-hand cutting orientation, a 1/4 inch (0.2500 inch decimal) inscribed circle, and a thickness of 0.1260 inches. Licensed machinists and CNC operators use this insert on lathes and turning centers when producing internal UN threads in production or job-shop environments.

This insert is suited for internal threading operations on a broad range of materials including steels, stainless steels, cast irons, non-ferrous alloys, and high-temperature alloys, as reflected by its primary workpiece material codes H, K, M, N, P, and S. The IC908 grade with PVD TiAlN coating is well matched to interrupted cuts and applications requiring edge toughness alongside heat resistance. It fits ISCARTHREAD series toolholders configured for 11IR insert geometry and is sold in multiples of 5, with each package containing 1 insert.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for wear and heat resistance
• Right-hand cutting, internal UN thread form at 18 TPI
• 1/4 inch inscribed circle (0.2500 inch decimal) for 11IR toolholder compatibility
• 0.1260 inch insert thickness for stable seating in laydown-style pockets
• Universal primary workpiece material compatibility across material codes H, K, M, N, P, and S
• Conforms to ISO 13399 insert identification standards

Compatibility

Designed for use in ISCARTHREAD series toolholders accepting the 11IR insert style with a 1/4 inch inscribed circle. Compatible with material grades C1, C2, C6, and C7 workpieces.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the insert pocket and clamping surfaces are clean and free of chips before installation. Follow the toolholder manufacturer's clamping torque specifications as stated in the toolholder documentation, and verify thread form with a calibrated thread gauge after first pass.