Carmex 16IR8ACMEP25C Laydown Threading Insert 8 Tpi

Product Description

The CARMEX 16IR8ACMEP25C is a solid carbide laydown threading insert designed for right-hand internal Acme thread cutting at 8 threads per inch (TPI). Built from solid carbide with a TiN finish, this insert delivers consistent thread form accuracy on internal Acme profiles. The 3/8-inch inscribed circle (IC) and 0.146-inch thickness fit standard laydown-style threading toolholders used on CNC lathes and manual turning centers. The TiN coating improves wear resistance and extends tool life in ferrous and non-ferrous materials. This insert is a professional-grade indexable solution for machinists producing Acme-threaded bores in production or job-shop environments.

This insert is suited for internal Acme thread applications on CNC turning centers and manual lathes. Acme threads are common in power-transmission components such as lead screws, linear actuators, vises, and jacks. The 8 TPI pitch targets medium-to-coarse thread profiles used in industrial and mechanical assemblies. Machinists working in production shops, tool rooms, or maintenance environments will find this insert appropriate for threading bores in steel, cast iron, aluminum, and similar machinable materials.

Key Features

• Solid carbide construction with TiN finish for extended wear resistance
• Right-hand internal Acme thread form at 8 TPI
• 3/8-inch inscribed circle fits standard laydown threading toolholders
• 0.146-inch insert thickness for secure, repeatable seating
• Laydown-style geometry for rigid clamping and accurate thread profile
• Indexable design reduces downtime compared to solid threading tools

Compatibility

Designed as an OEM-style replacement or production insert for laydown threading toolholders accepting a 3/8-inch IC threading insert with 0.146-inch thickness and an internal Acme thread form.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Power down and lock out the machine before indexing or replacing the insert. Seat the insert fully in the toolholder pocket and torque the clamping screw to the toolholder manufacturer's specification. Verify thread form and pitch with an appropriate Acme thread gauge before running production parts.