Carmex 16IR14STACMEMXC Threading Insert 14 Tpi Stub Acme

Product Description

The CARMEX 16IR14STACMEMXC is a solid carbide laydown threading insert designed for right-hand internal Stub Acme thread cutting at 14 threads per inch (TPI). Built from micrograin solid carbide and finished with a PVD-applied titanium nitride (TiN) coating, this insert delivers extended edge life and consistent thread form on demanding workpiece materials. The 3/8-inch inscribed circle and 0.146-inch thickness conform to the 16IR indexable insert style standard. It is installed by machinists and CNC lathe operators in production and job-shop environments where precision Stub Acme internal threads are required.

This insert is suited for internal Stub Acme threading operations on a wide range of workpiece materials, including steel, stainless steel, cast iron, non-ferrous alloys, high-temperature alloys, and hardened materials - as reflected by its universal material grade coverage (H, K, M, N, P, S). Typical applications include threading bores on hydraulic cylinders, lead screws, power transmission components, and similar parts where the 29-degree included angle Stub Acme form is specified. The MXC manufacturer grade is engineered for versatility across this broad material spectrum.

Key Features

• Solid micrograin carbide substrate for sharp, stable cutting edges on internal threads
• PVD TiN coating extends tool life and reduces built-up edge across multiple workpiece materials
• 14 TPI Stub Acme thread form with 29-degree included angle for accurate internal thread profiles
• Right-hand cut, 16IR laydown style for compatibility with standard 16IR boring bar toolholders
• 3/8-inch inscribed circle (0.375 inches) and 0.146-inch thickness per insert style specification
• Meets CE and ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in standard 16IR-style internal threading toolholders and boring bars that accept laydown threading inserts with a 3/8-inch inscribed circle. No specific toolholder model numbers were provided in the product data.

Installation Notes

Installation and indexing of carbide threading inserts should be performed by qualified machinists with the machine powered down and the spindle locked. Use the correct torx or hex key at the recommended seating torque for the toolholder manufacturer's clamp system - do not overtighten, as this can fracture the carbide insert. Ensure the insert is fully seated in the pocket before resuming cutting operations, and inspect the thread form with a thread gauge after the first pass to confirm proper setup.