Carmex 16IR20UNMXC/G Threading Insert 20 Tpi Solid Carbide

Product Description

The CARMEX 16IR20UNMXC/G is a solid carbide laydown threading insert designed for cutting internal UN threads on CNC lathes and threading machines. It runs at 20 threads per inch with a 60-degree included angle and features a PVD-applied TiN coating under the MXC micrograin carbide grade designation. The insert measures 3/8 inch (0.3750 inches) inscribed circle and 0.1460 inches thick. It is engineered for right-hand internal thread applications and suits a broad range of workpiece materials. Machinists and toolroom technicians working in production or job-shop environments install this insert into compatible laydown threading toolholders as a consumable cutting element.

This insert is suited for internal UN threading in both production and repair machining environments. The universal primary workpiece material classification means it is rated for use across steel, stainless, cast iron, non-ferrous metals, and high-temperature alloys. It fits standard 16-series laydown threading toolholders used on CNC turning centers and manual lathes equipped for insert-style threading. The MXC micrograin carbide grade with TiN PVD coating provides wear resistance across a wide range of cutting conditions without requiring application-specific grade changes.

Key Features

• Solid micrograin carbide substrate in MXC grade for consistent edge stability
• PVD TiN coating applied via physical vapor deposition for surface hardness and reduced friction
• 20 TPI internal UN thread form with 60-degree included angle
• Right-hand cut geometry for standard internal threading operations
• 3/8 inch inscribed circle (0.3750 inches) in 16-series insert sizing
• Universal material compatibility rated for steel, stainless, cast iron, non-ferrous, and superalloys

Compatibility

Designed for use in 16-series laydown internal threading toolholders. Compatible with workpiece material groups H, K, M, N, P, and S as defined by ISO cutting material classification standards.

Installation Notes

Installation is performed by machining technicians using standard insert clamping toolholders rated for the 16IR laydown insert style. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torx or hex key to torque the clamping screw per the toolholder manufacturer specification. Inspect the insert seat pocket for debris or damage before installation to ensure proper seating and thread form accuracy.