Carmex 16IR14NPTMXC/G Threading Insert 14 Tpi Npt Carbide

Product Description

The CARMEX 16IR14NPTMXC/G is a solid carbide laydown threading insert designed for cutting internal NPT (National Pipe Taper) threads on CNC lathes and threading machines. It carries a TiN (titanium nitride) coating applied via PVD process, which improves surface hardness and extends tool life across a range of workpiece materials. The insert produces right-hand internal threads at 14 threads per inch (TPI) with a 30-degree included angle, conforming to NPT thread standards. With a 3/8-inch inscribed circle and a thickness of 0.146 inches, this insert seats into standard 16IR-style toolholders. The MXC grade designation indicates a carbide substrate engineered for general-purpose and demanding threading applications.

This insert is suited for internal NPT thread-cutting operations in both production and job-shop environments. It covers a broad range of workpiece material types, including cast iron, non-ferrous metals, stainless steel, heat-resistant alloys, and steel (material codes H, K, M, N, P, S). Typical applications include pipe fitting bores, hydraulic component threading, and valve body machining where NPT thread form accuracy and surface finish consistency are required. This insert is sold individually, with a minimum order quantity of 50 pieces.

Key Features

• Solid carbide construction with PVD-applied TiN coating for extended wear resistance
• Right-hand internal NPT thread profile at 14 TPI with 30-degree included angle
• 16IR insert style with 3/8-inch inscribed circle fits standard 16IR toolholders
• 0.146-inch thickness for consistent seating and repeatable thread depth
• Universal workpiece material compatibility covering steel, stainless, cast iron, non-ferrous, and superalloys
• Certified to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in standard 16IR-style internal threading toolholders that accept laydown inserts with a 3/8-inch inscribed circle. Confirm toolholder pocket geometry and clamping style before installation.

Installation Notes

Installation and tool changes must be performed with the machine fully powered down and the spindle at a complete stop. Use the appropriate torx or hex key to the toolholder manufacturer's specified procedure when seating the insert. Inspect the insert pocket for debris or damage before each insert change to ensure proper seating and thread accuracy. Follow applicable shop safety procedures and machine tool manufacturer guidelines when programming thread-cutting cycles.