Iscar 5605120 Thread Mill 1/2-20 Unf 4 Flute Solid Carbide

Product Description

The ISCAR 5605120 is a solid carbide helical flute thread mill designed for cutting internal UNF threads at 1/2-20. It carries a 3/8-inch shank diameter and a 0.375-inch cutting diameter, with a length of cut of 0.880 inches and an overall length of 3.0 inches. The four right-hand helical flutes are coated with TiAlN and Titanium Nitride for heat resistance and extended tool life in demanding milling operations. Coolant-through capability allows for effective chip evacuation during deep or high-speed passes. This tool is installed and operated by machinists and CNC tooling professionals working in precision threading applications.

This thread mill is suited for internal threading operations on CNC machining centers where a single tool must produce a finished 1/2-20 UNF thread profile. The helical flute geometry makes it effective in materials that generate significant cutting heat or require close tolerance control on thread form. At 20 teeth per inch and a 0.500-inch minimum nominal diameter, it is appropriate for tight-tolerance bores in ferrous and non-ferrous workpieces across aerospace, automotive, and general manufacturing environments.

Key Features

• Solid carbide construction provides rigidity and dimensional stability during thread milling passes
• TiAlN and Titanium Nitride dual coating improves heat resistance and reduces built-up edge
• Coolant-through design supports chip flushing in deep or blind-hole applications
• Four right-hand helical flutes deliver smooth cutting action and improved surface finish
• Produces 1/2-20 UNF internal threads at 20 TPI with a 0.880-inch length of cut
• 3/8-inch shank diameter compatible with standard ER and milling chuck toolholders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation for internal UNF thread milling; requires a machine with coolant-through spindle capability to take full advantage of the coolant-through feature.

Installation Notes

This tool is installed by machinists or CNC setup technicians into a compatible toolholder such as an ER collet chuck or milling chuck sized for a 3/8-inch shank. Confirm spindle speed, feed rate, and helical interpolation arc radius are programmed correctly for the 1/2-20 UNF thread form before running the first part. Ensure the machine spindle and coolant system are fully stopped before tool changes. Do not use this tool in a manual drill press or non-interpolating spindle application.