Vargus 52553 Laydown Threading Insert 3IR 16 Tpi Un

Product Description

The VARGUS 52553 is a solid carbide laydown threading insert designed for internal UN thread cutting at 16 threads per inch (TPI). Featuring a 3IR insert style with a 60-degree included angle, this insert is built for right-hand internal threading operations on CNC lathes and turning centers. The VKX grade carbide substrate is paired with a PVD-applied TiN coating, which improves wear resistance and extends tool life across a wide range of workpiece materials. With a 9.53 mm (3/8 inch) inscribed circle and a thickness of 3.60 mm, the 52553 fits standard 3IR toolholders and delivers consistent thread form to ANSI B1.1:74 specifications.

This insert is suited for single-point internal threading on production and job-shop turning operations where UN thread profiles are required. The universal workpiece material compatibility covers carbon steels, alloy steels, stainless steels, cast irons, non-ferrous metals, and superalloys, making it a versatile option for shops that run varied material types. Machinists and CNC operators working in aerospace, general manufacturing, and industrial component production will find this insert applicable across a broad range of threading tasks.

Key Features

• Solid carbide construction with PVD TiN coating for extended wear resistance
• Right-hand internal UN thread form, 16 TPI, 60-degree included angle
• 3IR insert style, fits standard 3IR internal threading toolholders
• 9.53 mm inscribed circle (3/8 inch) with 3.60 mm thickness
• Universal workpiece material compatibility: carbon steel, stainless, cast iron, non-ferrous, and superalloys
• Meets ANSI B1.1:74 thread standard; manufactured under ISO 9001:2008 quality system

Compatibility

Designed as a direct-fit replacement for standard 3IR internal threading toolholders accepting a 3/8 inch inscribed circle laydown insert. Confirmed thread standard compatibility: ANSI B1.1:74 UN internal threads at 16 TPI.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator following the toolholder manufacturer's seating and clamping procedures. Power down and lock out the machine spindle before indexing or replacing inserts. Ensure the insert seat and clamping screw are clean and free of chips before seating the insert. Follow the toolholder manufacturer's recommended clamping torque specifications for 3IR-style inserts.