Scientific Cutting Tools TMI180-28HA Thread Mill 1/4-28

Product Description

The SCIENTIFIC CUTTING TOOLS TMI180-28HA is a solid carbide helical flute thread mill designed for cutting internal 1/4-28 UNF threads in a CNC machining environment. Built from submicron-grade carbide and coated with AlTiN+, it delivers heat resistance and edge retention in hard and abrasive materials. The tool features a 0.18-inch cutting diameter, a 0.515-inch length of cut, and a 2.5-inch overall length with a 1/4-inch shank. Three right-hand flutes provide chip clearance and consistent thread form through helical interpolation, making it a reliable choice for precision threaded features in production and job-shop settings.

This thread mill is suited for internal 1/4-28 UNF thread applications in materials including steel, stainless, aluminum, and high-temp alloys. Its long-reach design makes it practical for threaded holes where standard-length tooling cannot access the full depth. CNC machinists and toolroom operators use helical interpolation on machining centers to generate threads with a single tool pass, reducing tool inventory and eliminating tap breakage risk in difficult materials.

Key Features

• Solid carbide construction in submicron-grade material for rigidity and wear resistance
• AlTiN+ coating provides thermal protection and extended tool life in ferrous and exotic alloys
• Three right-hand helical flutes for efficient chip evacuation during thread milling
• Long-reach design at 2.5 inches OAL for access to deeper threaded features
• Cuts 1/4-28 UNF internal threads at 28 TPI with a 0.18-inch cutting diameter
• No coolant-through design - suitable for flood or mist coolant delivery at the spindle

Compatibility

Designed for use on CNC machining centers capable of helical interpolation, producing internal 1/4-28 UNF threads via a 1/4-inch tool holder or collet chuck.

Installation Notes

This tool is installed in a CNC machining center using a 1/4-inch collet, end mill holder, or shrink-fit chuck rated for the required RPM. Verify runout at the cutting end before production use, as excessive runout accelerates edge wear and degrades thread quality. Program helical interpolation per the tool manufacturer's recommended cutting parameters for the workpiece material and coating type. Do not use this tool in hand-held or manual-feed operations.