Carmex 21E24UNMT7 Carbide Thread Mill Insert 24 Tpi

Product Description

The CARMEX 21E24UNMT7 is a carbide thread mill insert designed for external UN thread milling at 24 teeth per inch (TPI). Built from submicron carbide in manufacturer grade MT7 with a TiAlN finish, this insert delivers consistent thread geometry and extended tool life in demanding machining environments. The 21E insert style is a single-profile design suited for CNC thread milling operations where precision and repeatability are critical. Thickness measures 0.185 inches. Machinists and tooling specialists working with unified national thread forms will find this insert a reliable production-grade option for external threading applications.

This insert is used in thread milling operations targeting external UN thread forms at 24 TPI. It is suited for use in CNC machining centers performing thread milling on ferrous and non-ferrous workpieces where a TiAlN-coated submicron carbide insert is specified. Typical applications include production threading in job shops, aerospace component machining, and general metalworking where consistent thread form accuracy is required across multiple parts.

Key Features

• Submicron carbide substrate in MT7 grade for wear resistance and edge stability
• TiAlN finish for heat resistance and extended insert life at higher cutting speeds
• 21E insert style for external UN thread profiles at 24 TPI
• Non-conical geometry for straightforward thread milling setups
• Thickness of 0.185 inches for precise seating in compatible thread mill bodies

Compatibility

Designed as an OEM-style replacement or production insert for thread mill toolholders accepting the 21E insert style in external UN thread milling applications.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the thread mill body and clamping mechanism are clean and free of chips before seating the insert. Power down and lock out the spindle before changing inserts. Follow the thread mill body manufacturer torque guidelines for the clamping screw to avoid insert movement or breakage during cutting.