Vargus 021-00980 Threading Insert 13 Tpi 3/8 Inch Ic

Product Description

The VARGUS 021-00980 is a solid carbide laydown threading insert designed for external UN thread cutting on CNC lathes and turning centers. Running at 13 threads per inch (TPI) with a 60-degree included angle, this insert is built for right-hand external threading operations. The AlTiN coating is applied via PVD process, improving heat resistance and edge life in demanding cutting conditions. At 3.6 mm (0.1417 inches) thick with a 3/8-inch inscribed circle, this insert is dimensioned to the 3ER style seat geometry. It is suited for machinists and toolroom professionals working to UN thread standards in steel and similar materials.

This insert is used in production and job-shop turning applications where consistent UN thread form is required. The right-hand external configuration makes it a standard choice for threading shaft diameters, fittings, and fastener blanks. The 3ER insert style fits compatible laydown threading toolholders designed for that seat geometry. It is appropriate for both high-volume production runs and low-volume precision work where thread accuracy and surface finish are critical to part function.

Key Features

• Solid carbide substrate with AlTiN PVD coating for extended tool life in heat-generating cuts
• 13 TPI UN thread form with 60-degree included angle for standard unified thread profiles
• 3ER insert style in laydown orientation for rigid, repeatable seating in compatible holders
• Right-hand external threading configuration for conventional lathe thread cutting
• 3/8-inch inscribed circle and 3.6 mm thickness for precise holder fit
• Manufacturer grade VRX optimized for performance across a range of workpiece materials

Compatibility

Designed as a direct-fit replacement for 3ER-style laydown threading toolholders requiring a 13 TPI UN external insert. Compatible holders must accept a 3/8-inch inscribed circle, 3.6 mm thick laydown insert geometry.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the toolholder is secured before seating or replacing the insert. Use the appropriate torx or clamping screw specified by the toolholder manufacturer to achieve proper clamping force without over-torquing the insert seat. Inspect the insert pocket for chips or wear before installing a new insert to maintain thread accuracy.