Carmex 16ER24UNBXC Threading Insert 24 Tpi 3/8 in External Un

Product Description

The CARMEX 16ER24UNBXC is a solid carbide laydown threading insert designed for external UN thread form cutting at 24 threads per inch. It features a PVD-applied TiN coating over a solid carbide substrate, delivering wear resistance and edge retention across a wide range of workpiece materials. The insert carries a 60-degree included angle consistent with the UN thread standard and measures 3/8 inch inscribed circle with a thickness of 0.146 inches. It is intended for use on CNC lathes and threading centers by machinists and toolroom professionals working to UN thread specifications.

This insert is suited for external threading operations on parts made from a broad set of materials, including steel, stainless steel, cast iron, non-ferrous alloys, heat-resistant alloys, and aluminum. Its universal workpiece material rating makes it a practical choice for job shops running varied work. The right-hand cutting geometry is standard for conventional lathe threading passes. It is commonly used in production threading of fasteners, fittings, shafts, and other turned components where UN thread form compliance is required.

Key Features

• Solid carbide substrate with PVD TiN coating for extended tool life
• 24 TPI UN external thread form with 60-degree included angle
• 3/8 inch inscribed circle fits standard ER-style laydown toolholders
• Right-hand cutting orientation for standard lathe threading passes
• Universal material compatibility covering steel, stainless, cast iron, non-ferrous, and high-temp alloys
• Manufactured to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in ER-style laydown threading toolholders that accept the 16ER insert size. Suitable for CNC lathes and threading centers performing external UN thread form operations across the material classes listed above.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before seating or replacing the insert. Use the appropriate torx or hex key specified by the toolholder manufacturer to achieve proper clamping torque without over-torquing the insert screw. Confirm insert seating and runout before initiating a threading pass.