Carmex 16IR16UNBMA Threading Insert 16 Tpi Un Solid Carbide

Product Description

The CARMEX 16IR16UNBMA is a solid carbide laydown threading insert designed for internal UN thread cutting at 16 threads per inch. Manufactured from submicron-grade solid carbide and coated with TiAlN via a PVD process, this insert delivers wear resistance and thermal stability across a wide range of workpiece materials. With a 3/8-inch inscribed circle and 0.146-inch thickness, it fits standard laydown insert toolholders used in CNC and manual lathe threading operations. Machinists and toolroom technicians install this insert for right-hand internal threading applications where consistent thread form and tool life are priorities.

This insert is suited for threading operations on a broad range of materials, including ferrous, non-ferrous, stainless, high-temp alloys, and cast materials, as indicated by its universal primary workpiece material rating. The 16 TPI UN thread form and 29-degree included angle make it appropriate for producing standard Unified National thread profiles in internal bores on production runs or maintenance work in job shop environments.

Key Features

• Solid carbide construction with submicron-grade material for extended edge life
• TiAlN PVD coating for heat resistance and reduced wear at elevated cutting speeds
• 16 TPI UN internal thread form with a 29-degree included angle
• Right-hand cut orientation for standard internal threading setups
• 3/8-inch inscribed circle fits common laydown-style threading toolholders
• Universal material compatibility across ferrous, non-ferrous, stainless, and high-temp alloy workpieces

Compatibility

Designed for use in laydown-style internal threading toolholders accepting a 16IR insert style with a 3/8-inch inscribed circle. Suitable for cutting UN-standard internal threads at 16 TPI on CNC lathes and manual threading setups.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's seating and clamping procedures. Ensure the machine spindle is fully stopped and the toolholder is properly secured before insert exchange. Verify insert orientation for right-hand internal threading before beginning a cut. Follow applicable shop safety and machine guarding protocols during tool changes.