Iscar 5902155 Threading Insert 7 Tpi 1/2 Inch IC908 Carbide

Product Description

The ISCAR 5902155 is a laydown threading insert designed for right-hand internal UN thread cutting. Built from solid carbide with an IC908 grade and a PVD-applied TiAlN coating, it delivers consistent thread form in demanding turning applications. The insert carries a 22IR style designation and is rated for 7 threads per inch (TPI). With a 0.5000-inch (1/2 inch) inscribed circle and a thickness of 0.188 inches, it fits standard ISCAR ISCARTHREAD toolholders configured for internal threading. Licensed machinists and CNC lathe operators install this insert for production and maintenance threading of internal UN-profile threads.

This insert is suited for internal threading operations on a wide range of workpiece materials. The IC908 grade with PVD TiAlN coating supports use across universal material groups, including steel, stainless steel, cast iron, non-ferrous alloys, and high-temperature alloys, corresponding to ISO material codes H, K, M, N, P, and S. It is used in CNC turning centers and manual lathes wherever consistent 7 TPI UN thread geometry is required on bored or pre-drilled internal features.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life across universal material groups
• Right-hand internal UN thread form at 7 TPI for precise thread cutting
• 22IR insert style with 0.5000-inch inscribed circle fits ISCARTHREAD internal threading toolholders
• 0.188-inch insert thickness provides stable seating in the pocket
• Corner radius of 0.0087 inches (0.22 mm) for accurate thread root geometry
• Compliant with ISO 13399 tooling data standards

Compatibility

Designed for use with ISCAR ISCARTHREAD toolholders accepting the 22IR insert style with a 1/2-inch inscribed circle. Compatible with workpiece material groups H, K, M, N, P, and S per ISO material classification.

Installation Notes

Insert replacement should be performed by a qualified machinist with the machine in a full stop and all motion axes locked out per facility lockout/tagout procedures. Ensure the toolholder pocket is clean and free of chips before seating the insert. Do not exceed the recommended depth of cut or feed rate for the IC908 grade as specified in the ISCAR tooling data sheet. Verify insert orientation for right-hand internal threading before resuming operation.