Carmex 12-18NPTMT7 Carbide Thread Mill Insert 18 Tpi

Product Description

The CARMEX 12-18NPTMT7 is a submicron carbide thread mill insert designed for cutting NPT-standard threads at 18 teeth per inch. Finished with a TiAlN coating for heat resistance and extended tool life, this insert handles both internal and external thread milling operations in a single setup. It features a conical profile that matches the tapered geometry required by ANSI B1.20.1-1983 NPT specifications. Insert style is 12IE with a thickness of 0.1142 inches (2.90 mm). Intended for use by machinists and tooling professionals working with thread mill toolholders in CNC machining environments.

This insert is suited for NPT pipe thread applications in both internal and external configurations, making it a versatile option for shops producing fittings, manifolds, and threaded ports. The 18 TPI conical geometry produces full-form NPT threads per ANSI B1.20.1-1983. It is appropriate for use in ferrous and non-ferrous materials where a TiAlN-coated submicron carbide grade provides adequate wear resistance. Typical applications include aerospace, industrial, and fluid-handling components requiring NPT thread forms.

Key Features

• Submicron carbide insert material for high wear resistance and edge stability
• TiAlN finish provides thermal protection during high-speed thread milling
• Machines internal and external NPT threads in a single tool path
• Conical insert profile produces full-form tapered NPT threads per ANSI B1.20.1-1983
• 18 TPI cutting geometry matches standard NPT 1/2-18 pipe thread pitch
• Manufacturer grade MT7 with ISO 9001:2015-certified production

Compatibility

Designed for use with compatible CARMEX thread mill bodies accepting 12-series inserts in the MT7 grade. Suitable for NPT thread milling applications conforming to ANSI B1.20.1-1983.

Installation Notes

Installation and changeout should be performed by a qualified machinist following the toolholder manufacturer's torque and seating specifications. Ensure the spindle is fully stopped and the CNC program is in a safe state before indexing or replacing inserts. Verify insert seating and clamping before resuming cutting operations. Follow applicable shop safety protocols for handling carbide cutting inserts, including use of appropriate eye protection.