Carmex 14E12UNMT7 Carbide Thread Mill Insert 12 Tpi

Product Description

The CARMEX 14E12UNMT7 is a carbide thread mill insert engineered for external UN thread milling applications. Built from submicron carbide with a TiAlN finish, this insert delivers consistent thread geometry at 12 teeth per inch. The MT7 manufacturer grade designation indicates a high-performance coating and substrate combination suited for threading in a wide range of work materials. The 14E insert style is a compact, indexable format used in CNC thread milling operations. At 0.122 inches thick, it mounts precisely in compatible toolholders and maintains dimensional accuracy across production runs. Machinists and CNC operators in job shops and production environments rely on this insert for repeatable UN thread forms on external features.

This insert is intended for external thread milling following the UN thread standard per ANSI B1.1-1989. It is used on CNC machining centers where thread milling is preferred over tapping, particularly in difficult materials or blind-hole applications where tap breakage is a concern. With 12 TPI, it covers common UN thread pitches used across general industrial fastener and fitting applications. The insert is not conical, making it suitable for straight-profile thread milling passes.

Key Features

• Submicron carbide substrate for improved edge strength and wear resistance
• TiAlN finish for extended tool life in ferrous and hardened materials
• 12 TPI external UN thread profile per ANSI B1.1-1989
• 14E insert style in a compact indexable format
• 0.122 inch insert thickness for consistent seating in compatible toolholders
• MT7 grade designation for high-performance coating and substrate pairing

Compatibility

Designed for use in CARMEX and compatible thread milling toolholders that accept the 14E insert style. Confirm toolholder seat geometry and clamping system compatibility before installation.

Installation Notes

Thread mill inserts are installed and replaced by machinists or tooling technicians on CNC machining centers. Power down and lock out the spindle before indexing or replacing inserts. Use the correct torx or hex key specified by the toolholder manufacturer to seat the insert without over-torquing the clamping screw. Handle carbide inserts with care to avoid chipping cutting edges prior to use.