Scientific Cutting Tools TM21827NPT-A Thread Mill Npt

Product Description

The SCIENTIFIC CUTTING TOOLS TM21827NPT-A is a straight flute thread mill designed for cutting NPT (National Pipe Taper) threads in both external and internal applications. Built from submicron-grade solid carbide and coated with TiAlN for extended tool life and heat resistance, this mill handles 1/16-27 and 1/8-27 NPT thread sizes in a single tool. With a 0.218 inch cutting diameter and 0.534 inch length of cut, it is suited for precision thread milling on CNC machining centers. Machinists and toolroom professionals in aerospace, plumbing fittings, and general manufacturing use this tool where tapped thread quality and repeatability are critical.

This thread mill is intended for use on CNC milling machines capable of helical interpolation. It covers two common small-diameter NPT pipe thread sizes, making it a practical choice for shops producing fittings, manifolds, or ported components that require tapered pipe thread forms. The straight flute geometry suits harder materials where chip control is less of a concern. It is appropriate for both prototype and production environments where a single tool covering multiple NPT sizes reduces changeover time.

Key Features

• Covers 1/16-27 and 1/8-27 NPT thread sizes in one tool
• Cuts both external and internal NPT threads
• Submicron-grade solid carbide construction for rigidity and wear resistance
• TiAlN coating for high-temperature and abrasion resistance
• 4 straight flutes with 27 teeth per inch
• 1/4 inch shank diameter fits standard ER and end mill holders

Compatibility

Designed for use on CNC machining centers capable of helical interpolation to produce NPT tapered pipe threads; compatible with standard 1/4 inch shank toolholders including ER collet chucks and end mill holders.

Installation Notes

Thread milling requires a CNC control with helical interpolation capability - confirm G-code support before programming. Secure the shank fully in a balanced, runout-minimized toolholder to maintain thread form accuracy. Follow the tool manufacturer's recommended speeds and feeds for solid carbide in the workpiece material being machined. Inspect the cutting edges before use; carbide thread mills are brittle and should not be dropped or mishandled.