Iscar 5901569 Threading Insert 18 Tpi Un Solid Carbide

Product Description

The ISCAR 5901569 is a laydown-style external threading insert designed for cutting Unified National (UN) thread forms on CNC lathes and threading-capable machining centers. Built from solid carbide with an IC908 grade and a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability across a broad range of workpiece materials. It is configured for right-hand external threading at 18 threads per inch (TPI), making it a direct-fit solution for jobs requiring standard UN fastener thread profiles. The M-style chipbreaker geometry promotes chip control during continuous threading passes. Machinists and tool-room technicians working in production or job-shop environments are the primary installers.

This insert is suited for external UN threading operations on materials spanning steel, stainless steel, cast iron, non-ferrous alloys, and high-temperature alloys, as indicated by workpiece material codes H, K, M, N, P, and S. Its 3/8-inch inscribed circle fits standard ER-style laydown threading toolholders designed for 16-series inserts. Typical applications include threading shafts, fittings, fasteners, and hydraulic components to UN specifications on CNC turning equipment.

Key Features

• Solid carbide construction with IC908 manufacturer grade for extended tool life
• PVD TiAlN coating provides thermal and oxidation resistance across universal workpiece materials
• 18 TPI UN thread form for right-hand external threading applications
• M-style chipbreaker geometry for controlled chip evacuation during threading passes
• 16ER insert style with 3/8-inch inscribed circle for use in compatible laydown toolholders
• Conforms to ISO 13399 cutting tool data representation standards

Compatibility

Designed for use in 16ER-series laydown threading toolholders that accept a 3/8-inch inscribed circle insert. Compatible with workpiece materials classified under material codes H, K, M, N, P, and S.

Installation Notes

This insert is installed and replaced by machinists or tooling technicians on CNC turning centers or manual lathes equipped with threading capability. Ensure the machine is in an e-stop or fully powered-off state before changing inserts. Use appropriate insert-clamping torque per the toolholder manufacturer specification and verify seating before resuming cuts. Handle carbide inserts with care to avoid chipping cutting edges prior to use.