Carmex 14I12UNMT7 Carbide Thread Mill Insert 12 Tpi

Product Description

The CARMEX 14I12UNMT7 is a carbide thread mill insert designed for internal threading operations to the UN standard at 12 teeth per inch. Built from submicron carbide in the MT7 grade, the insert carries a TiAlN (titanium aluminum nitride) coating that extends tool life under the heat and friction of thread milling. At 0.122 inches (3.1 mm) thick and styled as a 14I insert, it is engineered for use in thread milling toolholders on CNC machining centers. Installation and changeout are handled by CNC machinists and tooling specialists working to ANSI B1.1-1989 dimensional requirements for unified national thread forms.

This insert is intended for internal UN thread milling in precision machining environments. The TiAlN finish makes it well suited for dry or semi-dry cutting in ferrous and hardened materials where heat resistance is a priority. The 12 TPI specification covers a range of common unified thread pitches used in general industrial and mechanical assembly applications. This is not a single-point threading insert; it is sized and styled for indexable thread mill bodies used on multi-axis CNC platforms.

Key Features

• Submicron carbide substrate in MT7 grade for consistent edge integrity
• TiAlN coating improves heat resistance and extends tool life in ferrous materials
• 12 TPI for internal UN thread milling per ANSI B1.1-1989
• Insert thickness of 0.122 inches (3.1 mm) for precise seating in compatible toolholders
• 14I insert style for use with matching thread mill bodies
• Non-conical geometry for straight-flank UN thread profiles

Compatibility

Designed for use in thread mill toolholders that accept the 14I insert style. Conforms to ANSI B1.1-1989 for unified national (UN) internal thread forms. Confirm toolholder seat geometry and insert style code before ordering.

Installation Notes

Thread mill inserts are installed and indexed by CNC machinists or qualified tooling personnel. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and insert screw specified by the toolholder manufacturer - do not overtighten the clamping screw. Verify runout and tool projection after indexing before resuming cutting operations.