Scientific Cutting Tools TM.400-13 Thread Mill 1/2-13

Product Description

The SCIENTIFIC CUTTING TOOLS TM.400-13 is a straight flute thread mill designed for cutting internal 1/2-13 UNC threads in a CNC machining environment. Built from submicron-grade solid carbide, this tool offers the rigidity and wear resistance required for consistent thread form across production runs. It features 4 flutes, a 0.4-inch cutting diameter, and a 1.108-inch length of cut. The bright finish provides a low-friction surface without an applied coating, making it well suited for non-ferrous metals and other materials where coating adhesion is not critical. A licensed machinist or CNC programmer typically selects and runs this tool.

This thread mill is used in CNC machining centers for helical interpolation of internal 1/2-13 UNC threaded holes. Typical applications include production machining of aluminum, brass, and similar materials where a single tool must produce a full thread in one helical pass. The 0.5-inch shank diameter seats in a standard end mill holder or collet chuck, and the 3.5-inch overall length provides sufficient reach for most standard workpiece thicknesses. It is suited for both job shop and production floor environments requiring accurate internal UNC threads.

Key Features

• Submicron-grade solid carbide construction for high wear resistance and dimensional stability
• 4 straight flutes for efficient chip evacuation during helical interpolation
• Cuts 1/2-13 UNC internal threads with a 0.4-inch cutting diameter
• 1.108-inch length of cut accommodates typical thread depths for 1/2-13 fastener applications
• Bright finish reduces friction without an applied coating
• 0.5-inch shank diameter fits standard end mill holders and collet chucks

Compatibility

Designed for use in CNC machining centers capable of helical interpolation, producing internal 1/2-13 UNC threaded holes with a minimum nominal diameter of 0.5 inches.

Installation Notes

This tool is installed and operated by a CNC machinist or tooling engineer. Secure the shank fully in a precision collet chuck or end mill holder and verify runout before running the program. Power down and lock out the spindle before changing or inspecting the tool. Do not use this tool for straight plunge threading; helical interpolation is required for correct thread form.