Vargus 50442 2IR18UN Vkx Threading Insert 18 Tpi Solid Carbide

Product Description

The VARGUS 50442 is a laydown threading insert designed for right-hand internal UN thread cutting on CNC lathes and turning centers. It carries the VKX grade designation and is manufactured from solid carbide with a PVD-applied TiN coating for extended tool life and heat resistance. The insert produces threads at 18 teeth per inch and features a 60-degree included angle conforming to the UN thread form standard. With a 6.35 mm inscribed circle and a thickness of 3.17 mm, this insert fits the 2IR tool holder style. It is used by machinists and toolroom technicians requiring precise, repeatable internal thread profiles on a wide range of workpiece materials.

This insert is suited for internal threading operations on materials classified under the H, K, M, N, P, and S workpiece material codes, covering a broad spectrum from steels and stainless alloys to non-ferrous metals and heat-resistant materials. The 2IR insert style is a standard laydown geometry, making it compatible with widely available 2IR-style boring bar and threading toolholders. Typical applications include threading bores in hydraulic fittings, pipe couplings, and precision machined components where ANSI B1.1 UN thread form compliance is required.

Key Features

• Solid carbide construction with PVD TiN coating for wear resistance and longer tool life
• 18 TPI cutting edge ground to the 60-degree UN thread form angle
• Right-hand internal threading geometry in the standard 2IR insert style
• 6.35 mm inscribed circle fits 2IR-compatible boring bar toolholders
• Universal primary workpiece material rating covers H, K, M, N, P, and S material groups
• Manufactured to ANSI B1.1:74 thread standard and produced under ISO 9001:2008 quality certification

Compatibility

Designed as an OEM-style replacement threading insert for use in 2IR-style internal threading toolholders. Compatible with toolholder systems accepting a 2IR laydown insert with a 6.35 mm inscribed circle and 3.17 mm thickness. No specific OEM system compatibility data was provided in the product input.

Installation Notes

Installation and replacement should be performed by a qualified machinist or toolroom technician with the machine powered down and all axes secured. Seat the insert fully against the pocket locating surfaces before tightening the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert seat for chips or debris before mounting to ensure proper seating and thread accuracy. Follow all applicable shop safety procedures and machine tool manufacturer guidelines when changing cutting inserts.