Hertel 16ER12UNHG225TR Threading Insert 12 Tpi 3/8 Inch Ic

Product Description

The HERTEL 16ER12UNHG225TR is a solid carbide laydown threading insert designed for external UN thread cutting at 12 threads per inch. Manufactured in grade HG225TR and coated with TiAlN via a PVD process, this insert delivers wear resistance and thermal stability across a range of threading applications. The 3/8-inch inscribed circle and 0.146-inch thickness conform to standard 16ER geometry. Right-hand orientation makes it suitable for conventional external threading operations on CNC lathes and turning centers. Machinists and tool-and-die professionals working in production or job-shop environments install these inserts as indexable cutting elements in compatible ER-style threading toolholders.

This insert is suited for external UN thread profiles at 12 TPI on ferrous and non-ferrous workpiece materials where a PVD TiAlN coating is appropriate. Typical applications include threading on lathes in aerospace, automotive, and general manufacturing settings. The solid carbide substrate and HG225TR grade are selected for operations requiring consistent thread form accuracy and extended tool life in medium to high cutting speed ranges. This insert is sold individually with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate for rigidity and dimensional stability during threading
• TiAlN coating applied via PVD process for enhanced heat and wear resistance
• 16ER insert style with 3/8-inch inscribed circle and 0.146-inch thickness
• Right-hand cut for standard external UN thread profiles
• 12 TPI thread pitch for common unified national thread series work
• Minimum order quantity of 10 inserts per purchase

Compatibility

Designed as a direct-fit replacement for 16ER-style threading insert seats in compatible ER-series external threading toolholders that accept a 3/8-inch inscribed circle laydown insert geometry.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians on CNC or manual turning equipment. Ensure the machine spindle is stopped and all motion has ceased before indexing or replacing inserts. Seat the insert firmly and evenly in the toolholder pocket and secure the clamping screw to the toolholder manufacturer's specified procedure before resuming cutting operations. Verify thread form and pitch with appropriate gauging before running production parts.