Carmex 40E6UNMT7 Carbide Thread Mill Insert 6 Tpi

Product Description

The CARMEX 40E6UNMT7 is a carbide thread mill insert designed for external UN thread milling operations at 6 teeth per inch (TPI). Built to MT7 grade from submicron carbide, this insert carries a TiAlN finish that extends tool life in demanding cutting environments. The 40E insert style is a precision indexable component used in CNC thread milling applications where consistent thread form and surface quality are required. Machinists and tool-and-die professionals install this insert into compatible thread mill toolholders as part of multi-start or single-point thread milling cycles.

This insert is suited for external UN thread milling on machining centers and CNC mills. The UN thread standard covers unified inch threads widely used in North American manufacturing, making this insert applicable across general metalworking, aerospace, and industrial production environments. The 6 TPI configuration targets coarser thread pitches in the UN series. It is installed by machinists operating CNC equipment where thread milling is preferred over tapping for through-holes, blind holes, or difficult-to-tap materials.

Key Features

• Submicron carbide substrate provides high hardness and wear resistance for extended insert life
• MT7 manufacturer grade suited for thread milling in a range of workpiece materials
• TiAlN coating improves heat resistance and reduces friction at the cutting edge
• External thread geometry conforms to UN thread standard for unified inch applications
• 6 TPI configuration for coarse unified inch thread profiles
• Non-conical insert profile in the 40E style for consistent indexable fitment

Compatibility

Designed as an OEM-style indexable replacement insert for compatible CARMEX thread mill toolholders accepting the 40E insert style.

Installation Notes

This insert is installed by qualified machinists into compatible thread mill toolholders on CNC machining centers. Power down and lock out the machine spindle before seating or removing the insert. Use the correct torque driver for the insert clamping screw per the toolholder manufacturer specifications. Inspect the insert seat and clamping pocket for debris or damage before installation to ensure proper seating and thread form accuracy.