Scientific Cutting Tools SPTM160A Thread Mill 24-56 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM160A is a single profile thread mill designed for cutting both internal and external threads in the 12-24 to 12-56 thread size range, covering 24 to 56 TPI. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, this tool delivers high wear resistance and thermal stability in demanding threading operations. With a 0.16-inch cutting diameter, a 0.088-inch neck diameter, and a 0.40-inch length of cut, the SPTM160A is suited for fine-pitch threading in small-diameter bores and on external features. It is installed by machinists and CNC tooling professionals working in precision manufacturing environments.

This thread mill is used in CNC machining centers performing small-diameter threading operations across a range of materials. The single profile design allows one tool to cut multiple thread pitches within the 24 to 56 TPI range, reducing tooling inventory requirements. Its 3/16-inch shank diameter and 2-inch overall length make it compatible with standard collet and end mill holders used in vertical and horizontal machining centers. Typical applications include threaded hole production and external thread milling in tight-tolerance components.

Key Features

• Single profile design covers 12-24 to 12-56 thread sizes, 24 to 56 TPI
• Cuts both internal and external threads with one tool
• Submicron-grade solid carbide substrate for extended tool life
• AlTiN+ coating provides high-temperature resistance and reduced friction
• 3 flutes for efficient chip evacuation in small-diameter threading
• 0.088-inch neck diameter enables access in tight bore clearances

Compatibility

Designed for use in CNC machining centers with standard collet or end mill toolholders accepting a 3/16-inch shank diameter. Suitable for internal and external thread milling in the 12-24 to 12-56 thread size range.

Installation Notes

Thread mills of this type are installed by trained machinists in CNC machining environments. Ensure the spindle is fully stopped and the tool is properly seated and torqued in the holder before operation. Program helical interpolation tool paths appropriate for the target thread pitch and direction. Verify runout at the cutting diameter before threading production parts, as excess runout directly affects thread quality and tool life.