Scientific Cutting Tools SPTM059L Thread Mill 56-80 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM059L is a single profile thread mill designed for cutting internal and external threads in the 2-56 to 2-80 size range, covering 56 to 80 TPI. Built from submicron-grade solid carbide, it delivers the rigidity and edge retention needed for precision threading in hard materials. The three-flute geometry balances chip evacuation with cutting stability at small diameters. With a cutting diameter of 0.059 inches and a neck diameter of 0.034 inches, this tool reaches into tight bores while maintaining concentricity. It is used by machinists and tool-and-die professionals on CNC machining centers where a single tool must handle both internal and external thread profiles in the same setup.

This thread mill is suited for production and job-shop environments where fine-pitch, small-diameter threads are required in ferrous and non-ferrous workpieces. The bright uncoated finish makes it a practical choice for aluminum, brass, and other materials where coatings can affect dimensional accuracy. The 1/8-inch shank fits standard collet chucks and shrink-fit holders commonly found on VMCs and HMCs. Thread range covers number-2 fastener sizes from 56 to 80 TPI, making it applicable to precision instrument, electronics, and medical component work where these thread sizes are common.

Key Features

• Single profile design mills both internal and external threads in one tool
• Covers 2-56 to 2-80 thread range, 56 to 80 TPI
• Submicron-grade solid carbide construction for edge retention and rigidity
• 3-flute geometry for chip clearance at small cutting diameters
• 0.034-inch neck diameter allows access to confined bore geometries
• Bright uncoated finish suitable for non-ferrous and precision-tolerance applications

Compatibility

Designed for use in CNC machining centers with 1/8-inch collet or shrink-fit toolholding; compatible with any machine capable of helical interpolation and programmed for single-profile thread milling in the 2-56 to 2-80 thread size range.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation. Secure the 1/8-inch shank in a precision collet or shrink-fit holder to minimize runout at this cutting diameter. Confirm spindle and coolant are off before tool changes. Use cutting data and feed rates appropriate for submicron carbide at the specific workpiece material - do not apply drill-cycle programming to this tool.