Scientific Cutting Tools SPTM059LA Thread Mill 56-80 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM059LA is a single profile thread mill designed to cut both internal and external threads in the 2-56 to 2-80 range, covering 56 to 80 TPI. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, this tool delivers consistent thread geometry in a compact form factor suited to small-diameter, fine-pitch applications. The cutting diameter measures 0.059 inches with a 1/8-inch shank and a 1.5-inch overall length. With 3 flutes and a 0.200-inch length of cut, it is used in CNC machining centers where thread milling is preferred over tapping for precision, tool life, or material considerations.

This thread mill is intended for use in machining operations requiring fine-pitch threads in the number-2 screw size range. Its ability to produce both internal and external threads with a single tool makes it practical for job shops, production environments, and tool rooms working with small fastener features. The 0.034-inch neck diameter and 0.200-inch neck length allow access into shallow-boss and close-tolerance features. Machinists working in aerospace, medical device, electronics, and general precision manufacturing will find this tool appropriate for ferrous and non-ferrous materials where the AlTiN+ coating provides thermal resistance and extended edge life.

Key Features

• Cuts internal and external threads from 2-56 to 2-80 with a single tool
• Submicron-grade solid carbide construction for rigidity and wear resistance
• AlTiN+ coating provides high-temperature resistance and extended tool life
• 0.059-inch cutting diameter with 0.034-inch neck for access in tight features
• 3-flute geometry for balanced cutting action at fine pitch
• Compact 1.5-inch OAL fits standard CNC tool holders with 1/8-inch shank collets

Compatibility

Designed for use in CNC machining centers and mill-turn equipment accepting 1/8-inch shank tooling; suitable for thread milling operations in the 2-56 to 2-80 thread size range on internal and external features.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation; confirm the machine program uses the correct thread milling cycle before running. Secure the shank fully in a collet chuck or high-precision holder to minimize runout, which is critical at this diameter. Use manufacturer-recommended speeds and feeds for the workpiece material and reduce cutting parameters when first qualifying a new program. Inspect the cutting edge under magnification before and after use to detect chipping that may not be visible to the naked eye.