Carmex 11IR20UNMXC/G Laydown Threading Insert 20 Tpi

Product Description

The CARMEX 11IR20UNMXC/G is a solid carbide laydown threading insert designed for internal UN thread cutting at 20 threads per inch. Manufactured from micrograin solid carbide with a PVD-applied TiN coating, this insert delivers consistent thread form geometry and extended edge life in demanding threading operations. The 60-degree included angle conforms to the UN thread standard. With a 1/4 inch (0.2500 inch) inscribed circle and a thickness of 0.1270 inches, the insert fits standard laydown-style threading toolholders used in CNC turning and threading applications. It is suited for machinists and tooling specialists working across a broad range of workpiece materials.

This insert is rated for universal workpiece material compatibility, covering material groups H, K, M, N, P, and S. That range includes carbon steels, stainless steels, cast irons, non-ferrous metals, high-temperature alloys, and titanium alloys. The right-hand cutting orientation and internal thread configuration make it a direct fit for boring bar and internal threading toolholder setups used in production turning environments, job shops, and maintenance machining.

Key Features

• Solid micrograin carbide substrate for improved wear resistance and edge consistency
• PVD TiN coating applied via physical vapor deposition for extended tool life
• 20 TPI UN internal thread form with 60-degree included angle
• 1/4 inch inscribed circle (0.2500 inch) for compatibility with standard 11IR toolholders
• Right-hand cutting orientation for conventional internal threading setups
• Universal material grade rated for steel, stainless, cast iron, non-ferrous, and superalloys

Compatibility

Designed for use in standard 11IR-style internal threading toolholders. Cuts right-hand internal UN threads at 20 TPI. Suitable for universal workpiece material groups H, K, M, N, P, and S.

Installation Notes

Threading inserts should be seated and clamped according to the toolholder manufacturer specifications using the appropriate torx or clamping screw. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before changing inserts. Verify insert orientation matches the right-hand thread direction before initiating a threading pass. Qualified machinists or CNC tooling technicians should confirm thread pitch and insert grade selection prior to production runs.