Iscar 5902177 Threading Insert 16 Tpi 1/4 in IC908

Product Description

The ISCAR 5902177 is a laydown threading insert designed for right-hand internal UN thread cutting at 16 threads per inch (TPI). Built from solid carbide with a TiAlN PVD coating under the IC908 grade, this insert delivers consistent thread form in demanding cutting environments. It carries a 1/4 inch inscribed circle and measures 0.126 inches thick. The IC908 grade is engineered for high cutting speeds and wear resistance across a wide range of workpiece materials. This insert is used by machinists and toolroom professionals running CNC lathes or manual turning centers equipped with compatible ISCAR ISCARTHREAD toolholders.

The 5902177 is suited for internal threading operations on materials classified under ISO material groups H, K, M, N, P, and S, covering steels, cast irons, stainless alloys, non-ferrous metals, high-temperature alloys, and hardened materials. Typical applications include threading bores in hydraulic fittings, fluid connectors, and precision mechanical components where UN thread standards are required. It is most commonly installed in production and job-shop environments handling light to medium threading passes on internal features.

Key Features

• IC908 solid carbide grade with PVD-applied TiAlN coating for extended tool life
• Right-hand cutting geometry for standard internal UN threads at 16 TPI
• 1/4 inch inscribed circle, 11IR insert style for use in compatible toolholders
• 0.126 inch insert thickness providing stable seating in laydown-style pockets
• Qualified to ISO 13399 for standardized tool data exchange
• Universal workpiece material rating covering ISO groups H, K, M, N, P, and S

Compatibility

Designed for use with ISCAR ISCARTHREAD series toolholders accepting 11IR-style laydown threading inserts. Confirm pocket geometry and clamping style against the toolholder specification before installing.

Installation Notes

Threading inserts should be seated and indexed by a qualified machinist following the toolholder manufacturer torque and clamping procedures. Power down and lock out the spindle before changing inserts. Inspect the insert pocket for chips or wear before seating a new insert, as debris under the insert will affect thread accuracy. Do not exceed the recommended depth of cut or feed rate for the IC908 grade as specified in the ISCAR cutting data tables.