Carmex 20500722 Threading Insert 6 Tpi 1/2 in Ic Acme

Product Description

The CARMEX 20500722 is a laydown-style threading insert designed for cutting internal Acme threads on a lathe or CNC turning center. Built from solid carbide with a PVD-applied TiAlN coating, this insert offers strong wear resistance and thermal stability during threading operations. It is configured for right-hand internal thread cutting at 6 threads per inch (TPI) to the Acme thread standard. With a 1/2-inch inscribed circle (IC) and a thickness of 0.187 inches, this insert fits standard laydown threading toolholders. It is suited for machinists and tool and die professionals working in job shops or production environments.

This insert is used for internal Acme thread forms, which are common in lead screws, power transmission components, and linear motion assemblies. The Acme thread profile requires precise single-point threading, and this insert is ground to hold that profile at 6 TPI. It is appropriate for both prototype and production threading of ferrous and non-ferrous materials where a TiAlN PVD coating provides adequate surface protection and chip control.

Key Features

• Solid carbide substrate with PVD TiAlN coating for extended tool life
• Right-hand internal Acme thread geometry at 6 TPI
• Laydown insert style for secure seating in compatible toolholders
• 1/2-inch inscribed circle fits standard laydown threading bodies
• 0.187-inch insert thickness for stable cutting engagement
• CARMEX BMA grade carbide optimized for threading applications

Compatibility

Designed for use in laydown-style internal threading toolholders that accept a 22IR insert style with a 1/2-inch inscribed circle. Suitable for Acme thread form applications at 6 TPI in standard CNC and manual turning setups.

Installation Notes

Installation is performed by machining technicians or toolroom personnel. Ensure the toolholder and insert pocket are clean and free of chips before seating the insert. Secure the insert with the appropriate torque using a calibrated insert-clamping key - do not overtighten. Verify thread pitch and hand orientation against the workpiece specification before beginning the threading pass.