Carmex 14-18NPTMT7 Carbide Thread Mill Insert Npt

Product Description

The CARMEX 14-18NPTMT7 is a carbide thread mill insert engineered for cutting NPT (National Pipe Taper) threads at 18 teeth per inch. Manufactured from submicron carbide in grade MT7, this insert carries a TiAlN coating that extends tool life under high-heat cutting conditions. The conical profile matches the taper geometry required by ANSI B1.20.1-1983 for NPT thread forms. At 0.122 inches thick, the insert seats securely in compatible thread mill toolholders. Licensed trades machinists and toolroom technicians install this insert when producing both internal and external NPT threaded features on pipe fittings, manifolds, and fluid-system components.

This insert is suited for both internal and external NPT thread milling applications in production and job-shop environments. The 18 TPI configuration addresses standard NPT sizes where pipe-taper thread engagement is critical for pressure-tight sealing. It is commonly used in machining centers performing thread mill operations on ferrous and non-ferrous workpiece materials where TiAlN coating performance is an advantage at elevated cutting speeds. Minimum order quantity for this insert is 5 pieces; packaging quantity is 1 per pack.

Key Features

• Submicron carbide substrate in manufacturer grade MT7 for edge stability and wear resistance
• TiAlN coating provides thermal protection and extended tool life at higher cutting speeds
• Conical insert geometry conforms to NPT taper thread form per ANSI B1.20.1-1983
• Cuts both internal and external NPT threads from a single insert style
• 18 TPI thread pitch for standard NPT pipe thread profiles
• Insert thickness of 0.122 inches (3.1 mm) for consistent, repeatable seating in toolholders

Compatibility

Designed for use in thread mill toolholders that accept the 14IE insert style for NPT thread milling. Verify toolholder seat geometry and insert size code 14 compatibility before installation.

Installation Notes

Thread mill inserts should be installed and torqued using the toolholder manufacturer's recommended insert screw and wrench - do not substitute fasteners. Inspect the insert seat for chips or debris before seating the insert to ensure full contact and accurate thread geometry. Confirm spindle speed, feed rate, and helix compensation settings in the CNC program match the insert geometry and workpiece material before cutting. Handle carbide inserts with care; edges are brittle and can chip if dropped or impacted.