Vargus 52146 Threading Insert 12 Tpi Un Internal Carbide

Product Description

The VARGUS 52146 is a solid carbide laydown threading insert designed for cutting internal UN threads on CNC lathes and threading centers. Carrying the VKX grade designation, it features a PVD-applied TiN coating for wear resistance and extended tool life in production threading applications. The insert is configured for right-hand internal threading at 12 threads per inch with a 60-degree included angle, making it suitable for standard unified inch thread forms. Machinists and tooling specialists install this insert into compatible laydown-style threading toolholders as part of routine insert indexing or replacement.

This insert is intended for internal UN thread applications in ferrous and non-ferrous materials where a 3JIR insert style is specified. With a 3/8-inch (9.53 mm) inscribed circle and 3.60 mm thickness, it fits the standard laydown insert pocket geometry. It is well suited for job shops, production machining environments, and CNC threading operations requiring consistent thread form accuracy at 12 TPI.

Key Features

• Solid carbide construction with PVD TiN coating for heat and wear resistance
• Right-hand internal UN thread form at 12 TPI with 60-degree included angle
• Insert style 3JIR fits standard laydown threading toolholders
• 3/8-inch (9.53 mm) inscribed circle for precise pocket seating
• VKX manufacturer grade optimized for threading performance
• Single tooth per side geometry for controlled thread engagement

Compatibility

Designed as an OEM-style replacement insert for laydown threading toolholders accepting the 3JIR insert style with a 3/8-inch inscribed circle and 3.60 mm thickness.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Always power down and lock out the machine spindle before indexing or replacing threading inserts. Use the correct torque wrench and insert screw specified by the toolholder manufacturer to seat the insert properly without cracking the carbide. Inspect the insert pocket and clamping screw for wear or debris before installing a new insert.