Iscar 3323351 Carbide Thread Mill Insert 8 Tpi Un IC908

Product Description

The ISCAR 3323351 is a carbide thread milling insert designed for external UN thread forms at 8 threads per inch (TPI). It carries the IC908 manufacturer grade and features a TiAlN coating applied via PVD process, which provides thermal resistance and extended tool life during interrupted cuts and high-speed thread milling operations. The insert style is MT LNHU with a size code of 3005. It is installed by machinists and CNC tooling specialists working on precision threading applications across a range of workpiece materials including steel, cast iron, stainless, heat-resistant alloys, and non-ferrous metals.

This insert is suited for external thread milling operations where UN thread profiles at 8 TPI are required. The PVD TiAlN coating makes it appropriate for use on harder and more abrasive workpiece materials. Typical applications include production machining environments requiring consistent thread quality on external features in materials classified under ISO material groups H, K, M, P, and S. It is packaged individually and must be ordered in multiples of 2.

Key Features

• IC908 carbide grade with PVD-applied TiAlN coating for thermal and wear resistance
• External UN thread form at 8 TPI
• MT LNHU insert style, size code 3005
• Compatible with ISO material groups H, K, M, P, and S workpiece materials
• Conforms to ISO 13399 cutting tool representation standards
• Minimum order quantity of 2 units

Compatibility

Designed for use in MT LNHU-style thread milling toolholders accepting size 3005 inserts. Compatible with external UN thread milling applications at 8 TPI. Specific toolholder compatibility should be verified against ISCAR MT series toolholder documentation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool is secured before seating or replacing inserts. Use the correct torx or insert clamping key specified for the toolholder to avoid over-torquing the insert clamp screw. Verify thread form, TPI, and insert orientation against the job drawing before commencing any threading cycle.