Allied Machine TM18NPT Thread Mill 1/4 3/8 Npt 4 Flute Tialn

Product Description

The ALLIED MACHINE AND ENGINEERING TM18NPT is a helical flute thread mill designed for cutting NPT tapered pipe threads in both internal and external configurations. With 4 flutes and a TiAlN coating, this tool handles threading operations on a variety of workpiece materials while maintaining cutting edge durability at elevated temperatures. The cutting diameter is 0.305 inches with a 0.312-inch shank diameter, and threads are cut at 18 teeth per inch. Licensed machinists and CNC operators working in precision manufacturing, pipe fitting production, or maintenance shops will find this tool suited for tight-tolerance NPT thread work.

This thread mill is applied in machining centers where NPT tapered threads in the 1/4-inch and 3/8-inch nominal sizes are required. It covers both internal threads in fittings, manifolds, and housings and external threads on pipe ends or turned components. With a 0.625-inch length of cut and 3-inch overall length, it fits standard toolholders on vertical and horizontal machining centers. The TiAlN coating supports dry or semi-dry cutting and extends tool life in ferrous and non-ferrous materials.

Key Features

• Cuts NPT tapered threads in 1/4-inch and 3/8-inch sizes with a single tool
• Internal and external thread capability eliminates the need for separate tools
• 4-flute helical geometry provides balanced cutting forces and smooth thread form
• TiAlN coating improves heat resistance and extends tool life in production environments
• 0.312-inch shank diameter fits standard CNC toolholders and shrink-fit chucks
• No coolant-through requirement simplifies setup on standard machining centers

Compatibility

Designed as an OEM-style replacement or direct-fit thread mill for CNC machining centers accepting a 0.312-inch shank diameter and programmed for NPT tapered pipe thread cycles.

Installation Notes

Installation and operation should be performed by a qualified CNC machinist or toolroom professional. Secure the shank in a properly sized collet or toolholder and verify runout before cutting to protect thread accuracy. Program the machine for helical interpolation as required by NPT thread geometry. Follow all machine guarding and lockout-tagout procedures before tool changes.