Iscar 5902603 Threading Insert 16 Tpi Acme External IC908

Product Description

The ISCAR 5902603 is a laydown threading insert engineered for external Acme thread cutting at 16 threads per inch (TPI). Built from solid carbide with a TiAlN coating applied via PVD process, it delivers wear resistance and thermal stability during threading operations on a wide range of workpiece materials. The insert follows the 16ER style designation, carries the IC908 manufacturer grade, and features a 3/8 inch inscribed circle with a thickness of 0.143 inches. It is used by machinists and toolroom professionals working on CNC lathes and manual threading equipment where precise Acme profile accuracy is required.

This insert is suited for right-hand external Acme threading operations in production and job-shop environments. The IC908 grade with TiAlN PVD coating supports universal workpiece material compatibility, covering material codes H, K, M, N, P, and S — spanning steels, stainless, cast iron, non-ferrous alloys, and superalloys. It is part of the ISCARTHREAD series and conforms to ISO 13399 tooling data standards, making it compatible with digital tool management systems. Typical applications include power transmission components, lead screws, and jack screws that require the trapezoidal Acme thread form.

Key Features

• 16ER insert style for right-hand external Acme threading at 16 TPI
• IC908 carbide grade with PVD-applied TiAlN coating for extended tool life
• 3/8 inch (9.53 mm) inscribed circle with 0.143 inch thickness
• Universal material compatibility across H, K, M, N, P, and S workpiece codes
• Conforms to ISO 13399 for standardized tool data exchange
• Part of the ISCARTHREAD series for consistent holder and pocket compatibility

Compatibility

Designed as an OEM-style replacement insert for ISCARTHREAD series threading toolholders accepting the 16ER insert style with a 3/8 inch inscribed circle seating pocket.

Installation Notes

Installation should be performed by a qualified machinist with the machine powered down and spindle locked before seating or replacing the insert. Ensure the toolholder pocket and clamping surfaces are clean and free of chips before inserting. Use the appropriate torx or clamping key specified by the toolholder manufacturer to secure the insert — do not overtighten by feel alone. Verify thread profile alignment with a thread gauge before returning the machine to production cuts.