Carmex 14E28UNMT7 Carbide Thread Mill Insert 28 Tpi

Product Description

The CARMEX 14E28UNMT7 is a carbide thread mill insert designed for external UN thread milling applications at 28 teeth per inch (TPI). Built from submicron carbide in the MT7 grade, this insert features a TiAlN coating that reduces heat buildup and extends tool life in demanding threading operations. At 0.122 inches (3.1 mm) thick, the 14E insert style delivers precise thread form geometry on external UN profiles conforming to ANSI B1.1-1989. Machinists and toolroom professionals specify this insert for CNC thread milling where consistent thread quality and insert longevity are required.

This insert is suited for external UN thread milling on CNC machining centers in both production and job-shop environments. The UN thread standard and 28 TPI specification make it applicable to fine-thread work on a range of workpiece materials where a TiAlN-coated submicron carbide tool provides a clear advantage in tool life and surface finish. It is installed and changed by machinists or CNC operators as part of a thread mill toolholder system.

Key Features

• Submicron carbide substrate in MT7 grade for improved wear resistance and edge retention
• TiAlN coating reduces cutting temperatures and extends insert life in ferrous and hardened materials
• 28 TPI external UN thread form per ANSI B1.1-1989
• Insert style 14E with 0.122 inch thickness for precise fit in compatible thread mill bodies
• Non-conical geometry for straightforward thread mill programming
• Certified to ISO 9001:2015, ISO 14001:2015, ISO 45001, and ISO 13485:2016 manufacturing standards

Compatibility

Designed as an OEM-style replacement insert for thread mill toolholders that accept the 14E insert style with external UN thread geometry.

Installation Notes

Thread mill inserts are installed and replaced by machinists using the torque specifications provided by the toolholder manufacturer - do not use generic torque values. Ensure the machine spindle is fully stopped and the CNC program is in a safe state before changing inserts. Inspect the toolholder pocket and clamping screw for wear or damage before seating a new insert. Follow the thread mill toolholder manufacturer guidelines for proper insert indexing and clamping procedure.