Scientific Cutting Tools TM180-28N Thread Mill 1/4-28

Product Description

The SCIENTIFIC CUTTING TOOLS TM180-28N is a straight flute thread mill designed for cutting internal 1/4-28 UNF threads in a single helical pass. Built from powdered metal and finished with a TiCN coating, it delivers wear resistance and extended tool life in ferrous and non-ferrous materials. The cutter features 3 flutes, a 0.18-inch cutting diameter, and a 0.514-inch length of cut. With a 1/4-inch shank diameter and 2.5-inch overall length, the TM180-28N fits standard toolholders used in CNC machining centers. This tool is selected by machinists and toolroom professionals for precision internal thread milling applications.

This thread mill is suited for internal thread milling operations on CNC machining centers in job shop, production, and maintenance environments. It produces 1/4-28 UNF threads at 28 teeth per inch and is appropriate for through-hole and blind-hole applications where thread milling is preferred over tapping. The straight flute design simplifies chip evacuation in many common workpiece materials. No coolant-through capability is present, so external coolant or cutting fluid delivery should be used where required.

Key Features

• 1/4-28 UNF internal thread profile at 28 TPI
• Powdered metal construction for improved wear resistance over standard HSS
• TiCN coating reduces friction and extends cutting tool life
• 3 straight flutes with 0.18-inch cutting diameter
• 0.514-inch length of cut accommodates typical thread depths for 1/4-28 fastener applications
• 1/4-inch shank diameter fits common collet and toolholder systems

Compatibility

Designed as an OEM-style thread mill for CNC machining centers accepting a 1/4-inch shank, producing internal 1/4-28 UNF threads.

Installation Notes

Thread mills are installed and operated by machinists on CNC machining centers using appropriate collet chucks or end mill holders sized for a 1/4-inch shank. Ensure the spindle and toolholder are clean and properly torqued before operation. Program a helical interpolation toolpath matched to the 1/4-28 UNF thread specification. Use external cutting fluid or coolant, as this tool does not have coolant-through capability.