Carmex 14-14NPTMT7 Carbide Thread Mill Insert Npt

Product Description

The CARMEX 14-14NPTMT7 is a carbide thread mill insert designed for cutting NPT-standard threads at 14 teeth per inch. Manufactured from submicron carbide in grade MT7, it features a TiAlN coating for extended tool life in demanding thread milling operations. The conical insert geometry supports both internal and external thread profiles, making it a versatile single-tool solution for NPT fittings and pipe thread applications. It is installed by machinists and CNC tooling specialists in production and job-shop environments where consistent NPT thread form and surface finish are required.

This insert is suited for NPT pipe thread milling on ferrous and non-ferrous workpieces in both internal and external configurations. The 14 TPI specification aligns with ANSI B1.20.1-1983, covering standard taper pipe thread dimensions. Typical applications include threading pipe ports, fittings, and manifold bores where NPT taper thread engagement and leak-free sealing are critical. The insert style code is 14IE, indicating its dual internal and external capability within a single insert profile.

Key Features

• Submicron carbide substrate in manufacturer grade MT7 for wear resistance and edge integrity
• TiAlN coating extends tool life in high-temperature cutting conditions
• Conical insert geometry supports NPT taper thread form per ANSI B1.20.1-1983
• 14 TPI thread pitch for standard NPT pipe thread profiles
• Dual-use insert: cuts both internal and external NPT threads
• Insert thickness of 0.122 inches (3.1 mm) for consistent seat and clamping stability

Compatibility

Designed for use in compatible CARMEX MT7-series thread mill bodies that accept 14IE-style inserts for NPT thread milling applications.

Installation Notes

Installation and replacement of thread mill inserts should be performed by qualified machinists or CNC tooling technicians. Ensure the spindle is fully stopped and machine power is locked out before seating or removing the insert. Use the correct torx or hex key to the toolholder manufacturer's specified seating procedure; do not overtighten the clamping screw. Verify insert orientation and confirm the 14 TPI NPT profile matches the workpiece thread requirement before resuming cutting operations.