Vargus 52418 Threading Insert 3IR 12 Tpi 3/8 Inch Ic Tin

Product Description

The VARGUS 52418 is a solid carbide laydown threading insert designed for internal UN thread cutting operations. It carries the 3IR insert style with a 12 threads-per-inch (TPI) pitch and a 3/8-inch inscribed circle (IC), making it a standard-size insert suited for a wide range of internal threading applications on CNC lathes and turning centers. The 60-degree included angle conforms to UN thread geometry, and the TiN coating is applied via PVD process, providing surface hardness and wear resistance. This insert is installed in a right-hand orientation and is intended for use by machinists and tooling professionals in production or job-shop environments.

The 52418 is rated for universal workpiece material compatibility, covering material groups H, K, M, N, P, and S. This spans a broad range including steels, stainless steels, cast irons, non-ferrous metals, high-temperature alloys, and hardened materials. It is well suited for threading operations on shaft bores, coupling bodies, fittings, and similar components requiring precise internal UN thread profiles. The insert conforms to ANSI B1.1:74 thread standards and is manufactured under ISO 9001:2008 quality certification.

Key Features

• Solid carbide construction with PVD-applied TiN coating for extended tool life
• 3IR insert style with 12 TPI pitch and 60-degree included angle for UN thread geometry
• 3/8-inch inscribed circle for standard toolholder compatibility
• Right-hand internal threading orientation
• Universal material compatibility across groups H, K, M, N, P, and S
• Conforms to ANSI B1.1:74 thread standard

Compatibility

Designed as an OEM-style replacement threading insert for toolholders accepting 3IR-style laydown inserts with a 3/8-inch inscribed circle in standard series configurations.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the toolholder pocket and clamping screw are clean and free of chips before seating the insert. Follow the toolholder manufacturer's clamping torque specifications and verify insert orientation matches the right-hand internal thread designation before operation.