Scientific Cutting Tools TMX550-11.5-HA Helical Thread Mill Npt

Product Description

The SCIENTIFIC CUTTING TOOLS TMX550-11.5-HA is a solid carbide helical flute thread mill designed for cutting NPT threads in both internal and external applications. Built from submicron-grade carbide and finished with an AlTiN+ coating, this tool delivers high wear resistance and thermal stability in demanding machining environments. It features 4 right-hand flutes with a 0.5500-inch cutting diameter and a 1.1710-inch length of cut, making it suitable for threading operations that require a single-pass helical interpolation strategy. Machinists and tool-and-die professionals working with NPT pipe thread profiles will find this tool suited to production and maintenance machining contexts.

This thread mill is configured to produce NPT 1-11-1/2 and 2-11-1/2 thread sizes, covering both 1-inch and 2-inch nominal pipe thread diameters in a single tool. The 5/8-inch shank diameter provides secure clamping in standard ER or side-lock toolholders. With a 4.0000-inch overall length and a minimum nominal diameter of 1.0000 inch, it is appropriate for CNC machining centers performing pipe thread operations on ferrous and non-ferrous materials. This tool is typically used in job shops, maintenance facilities, and production environments where NPT threads are required in fittings, manifolds, and pipe flanges.

Key Features

• Submicron solid carbide substrate for superior hardness and edge retention
• AlTiN+ coating provides elevated heat and oxidation resistance during high-speed threading
• Cuts both NPT 1-11-1/2 and 2-11-1/2 thread profiles with a single tool
• 4 right-hand helical flutes for efficient chip evacuation during interpolation
• Internal and external thread milling capability reduces tooling inventory requirements
• 0.5500-inch cutting diameter with 1.1710-inch length of cut supports full thread depth engagement

Compatibility

Designed for CNC machining centers capable of helical interpolation; compatible with NPT 1-11-1/2 and 2-11-1/2 thread standards as specified. Accepts standard 5/8-inch shank toolholders.

Installation Notes

Thread milling with helical interpolation requires a CNC machining center with 3-axis simultaneous motion capability. Confirm toolholder runout is within acceptable limits before use, as excessive runout will degrade thread quality and tool life. Power down the spindle and follow lockout/tagout procedures when changing or inspecting the tool. Do not use this tool in manual milling operations.