Carmex 40I8UNMT7 Carbide Thread Mill Insert 8 Tpi

Product Description

The CARMEX 40I8UNMT7 is a carbide thread mill insert designed for internal UN thread milling at 8 teeth per inch (TPI). Built from submicron carbide in manufacturer grade MT7 with a TiAlN finish, this insert delivers hard, wear-resistant cutting performance in demanding threading applications. At 0.248 inches thick, the 40I insert style is engineered for consistent thread geometry across production runs. It is installed by machinists and CNC operators working with thread milling toolholders on machining centers and CNC mills.

This insert is suited for internal thread milling operations where UN thread standards are required, conforming to ANSI B1.1-1989. The TiAlN coating improves heat resistance and extends tool life in ferrous and non-ferrous materials. The 40I insert size code and non-conical geometry make this a straightforward replacement insert for compatible thread mill bodies in production and job-shop environments. Minimum order quantity is 2 inserts; package quantity is 1.

Key Features

• Submicron carbide substrate in MT7 grade for extended edge life
• TiAlN finish for improved heat and wear resistance
• 8 TPI internal UN thread profile per ANSI B1.1-1989
• Insert style 40I, size code 40, non-conical geometry
• 0.248 inch insert thickness for consistent seating in compatible toolholders
• Certified to ISO 9001:2015, ISO 14001:2015, ISO 45001, and ISO 13485:2016

Compatibility

Designed as a replacement insert for thread mill bodies that accept the 40I insert style in internal UN thread milling applications conforming to ANSI B1.1-1989.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before inserting or replacing thread mill inserts. Use the correct torx or insert-clamping wrench specified for the toolholder to seat the insert properly - do not overtighten by hand estimation. Verify insert seating and orientation before resuming cutting operations.