Carmex 16IR8UNBXC Threading Insert 8 Tpi 3/8 in Internal Un

Product Description

The CARMEX 16IR8UNBXC is a solid carbide laydown threading insert designed for internal UN thread cutting at 8 threads per inch (TPI). It features a 3/8 inch inscribed circle and a 60-degree included angle, making it suited for precise right-hand thread profile work on a variety of workpiece materials. The TiN finish is applied via PVD coating, which helps extend tool life under demanding cutting conditions. This insert is intended for use by machinists and toolroom professionals running CNC lathes or manual turning equipment.

This insert is used in internal threading operations across a broad range of materials, including steels, stainless steels, cast iron, non-ferrous metals, and high-temperature alloys, corresponding to workpiece material codes H, K, M, N, P, and S. Its universal primary workpiece material rating makes it a versatile choice for shops handling mixed-material production runs. Typical install scenarios include single-point threading on CNC turning centers using compatible IR-style toolholders.

Key Features

• Solid carbide construction for rigidity and wear resistance in threading applications
• TiN PVD coating extends cutting edge life and reduces built-up edge
• 8 TPI UN internal thread profile with 60-degree included angle
• 3/8 inch inscribed circle for compatibility with standard 16IR toolholders
• Right-hand cut orientation for conventional internal threading
• Certified to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use with 16IR-style internal threading toolholders. Suitable for right-hand internal UN thread cutting at 8 TPI across workpiece materials classified under codes H, K, M, N, P, and S.

Installation Notes

Installation and indexing of threading inserts should be performed by a qualified machinist with the machine powered down and the spindle locked. Seat the insert fully in the toolholder pocket and tighten the clamping screw to the toolholder manufacturer's specified torque using the appropriate Torx or hex key. Verify thread pitch and insert orientation before resuming cutting operations. Follow applicable shop safety procedures for carbide tooling handling, as edges are sharp and carbide is brittle.