Scientific Cutting Tools TM170-24A Thread Mill 1/4-24

Product Description

The SCIENTIFIC CUTTING TOOLS TM170-24A is a straight flute thread mill designed for cutting internal 1/4-24 UNS threads in a single helical pass. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, this tool delivers heat resistance and edge retention in demanding milling applications. It runs 3 flutes on a 0.17-inch cutting diameter with a 0.559-inch length of cut, mounted on a 1/4-inch shank. The 2.5-inch overall length suits standard toolholders on CNC machining centers. Machinists and tool-and-die professionals use this mill where tapping is impractical or where thread quality and tool life are the priority.

This thread mill is suited for precision machining environments producing internal 1/4-24 UNS threads in materials that benefit from carbide tooling, including hardened steels, stainless alloys, and nonferrous metals. The straight flute geometry and solid carbide construction make it appropriate for short-run and production work on vertical and horizontal CNC machining centers. The minimum nominal bore diameter of 1/4 inch defines the smallest hole into which this tool will fit.

Key Features

• Internal 1/4-24 UNS thread form, 24 teeth per inch
• Submicron-grade solid carbide body for rigidity and wear resistance
• AlTiN+ coating provides thermal barrier and extends tool life in ferrous materials
• 3 straight flutes on a 0.17-inch cutting diameter
• 0.559-inch length of cut handles standard thread depths for this diameter
• Non-coolant-through design; external coolant or air blast is the standard approach

Compatibility

Designed for use in CNC machining centers accepting a 1/4-inch straight shank; compatible with any application requiring an internal 1/4-24 UNS thread form with a minimum nominal bore diameter of 1/4 inch.

Installation Notes

Installation and operation require a CNC machining center with helical interpolation capability programmed to the correct thread lead for 1/4-24. Secure the shank in a collet or endmill holder to the depth recommended by the toolholder manufacturer before running any program. Verify spindle speed and feed rate against the manufacturer cutting data for the workpiece material before engaging the cut. Do not use in manual or non-CNC equipment, as thread milling requires coordinated three-axis motion.