Vargus 51783 Threading Insert 40 Tpi Un Solid Carbide

Product Description

The VARGUS 51783 is a laydown-style threading insert designed for external UN thread forms at 40 threads per inch (TPI). Made from solid carbide with a PVD-applied TiN coating, this insert delivers consistent thread geometry on a wide range of workpiece materials. The 3ER insert style features a 60-degree included angle, a 9.53 mm (3/8 inch) inscribed circle, and a 3.60 mm thickness. It is manufactured to ANSI B1.1:74 and ISO 9001:2008 standards. This insert is used by machinists and tooling specialists on CNC lathes and threading operations requiring precise UN-profile external threads.

The 51783 is suited for right-hand external threading applications across a broad range of workpiece materials, including common metal groups classified under universal material codes H, K, M, N, P, and S. Typical applications include production threading on carbon steels, stainless steels, non-ferrous metals, and high-temperature alloys. It fits standard 3ER insert pockets and is sold individually, making it practical for both single-insert replacement and tooling inventory restocking.

Key Features

• Solid carbide construction with PVD TiN coating for wear resistance across universal workpiece materials
• 40 TPI UN external thread form with 60-degree included angle per ANSI B1.1:74
• 3ER insert style - 9.53 mm (3/8 inch) inscribed circle, 3.60 mm thick
• Right-hand cutting orientation for standard external threading setups
• Single tooth per side design for controlled chip formation and clean thread profile
• Manufactured under ISO 9001:2008 quality standards

Compatibility

Designed as a direct-fit replacement for standard 3ER insert pockets used in external UN threading tool holders. Compatible with workpiece material groups H, K, M, N, P, and S as defined by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist following the tool holder manufacturer's torque specifications for insert clamping. Power down and lock out the machine spindle before seating or removing the insert. Inspect the insert pocket and clamping screw for wear or debris before installation to ensure proper seating and thread accuracy. Do not exceed the recommended depth of cut or feed rate for the insert grade.