Carmex 16IR8STACMEBXC Threading Insert 8 Tpi Solid Carbide

Product Description

The CARMEX 16IR8STACMEBXC is a solid carbide laydown threading insert designed for cutting internal Stub Acme threads. It operates at 8 threads per inch (TPI) with a 29-degree included angle, making it specific to the Stub Acme thread standard. The insert features a TiN coating applied via PVD process, which extends tool life across a wide range of workpiece materials. With a 3/8 inch (0.3750 inch) inscribed circle and a thickness of 0.146 inches, this right-hand insert fits toolholders designed for the 16IR insert style. It is installed and used by machinists and CNC lathe operators performing precision internal threading operations.

This insert is suited for internal threading applications across universal workpiece materials, including steels, cast iron, non-ferrous metals, non-metals, and heat-resistant alloys as indicated by material codes H, K, M, N, P, and S. It is a fit for both manual and CNC lathe setups where Stub Acme thread forms are required, such as lead screws, linear actuators, and power transmission components. The 16IR insert style seats in compatible laydown threading toolholders used in production and job shop environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in threading operations
• TiN coating via PVD process for extended tool life across multiple material types
• Right-hand internal Stub Acme thread form at 8 TPI with a 29-degree included angle
• 3/8 inch inscribed circle (0.3750 inch) for compatibility with 16IR-style toolholders
• Universal material compatibility covering steels, cast iron, non-ferrous metals, non-metals, and superalloys
• Meets CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in 16IR-style laydown threading toolholders configured for internal Stub Acme thread cutting. Compatible with workpiece material codes H, K, M, N, P, and S as specified by the manufacturer.

Installation Notes

Installation is performed by a machinist or CNC operator. Ensure the lathe or turning center is fully powered down and the spindle is locked before seating or replacing the insert. Use the appropriate torx or clamping screw driver specified for the toolholder to secure the insert without over-torquing the clamp seat. Verify insert orientation and thread hand before beginning the threading cycle.