Scientific Cutting Tools SPTM240LA Thread Mill 5/16 Carbide

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM240LA is a single profile thread mill designed for cutting both internal and external threads across a range from 5/16-16 to 5/16-48, spanning 16 to 48 TPI. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, it delivers the hardness and heat resistance required for threading operations in ferrous and non-ferrous materials. The 4-flute geometry produces clean thread forms in a single helical pass. With a 0.24-inch cutting diameter, a 1/4-inch shank, and an overall length of 2.5 inches, this tool is sized for CNC machining centers where precision and tool longevity are the priority.

This thread mill is suited for job shops, production machining, and maintenance environments where a single tool must cover a broad TPI range on one shank size. It handles both blind and through-hole applications on a CNC machining center using helical interpolation. The 5/16-16 to 5/16-48 thread range makes it a practical choice when cutting fine and coarse threads in the same workpiece without a tool change for thread size. It is installed and run by machinists and CNC programmers working to print tolerances on threaded features in steel, stainless, aluminum, and similar materials.

Key Features

• Single profile design cuts internal and external threads from 16 to 48 TPI with one tool
• Submicron-grade solid carbide substrate for rigidity and wear resistance
• AlTiN+ coating provides thermal protection and extended tool life in abrasive materials
• 4-flute configuration for efficient chip evacuation and thread finish quality
• 0.153-inch neck diameter allows reach into recessed or counterbored features
• 0.8-inch neck length and 0.8-inch length of cut support deep-thread applications within the tool reach envelope

Compatibility

Designed for use on CNC machining centers capable of helical interpolation, with a standard 1/4-inch straight shank compatible with ER collet chucks and other 1/4-inch toolholding systems. Covers thread sizes 5/16-16 through 5/16-48 in both internal and external applications.

Installation Notes

This tool is installed and operated by machinists on CNC machining centers using helical interpolation cycles - confirm the control supports thread milling before use. Secure the shank in a balanced, concentric toolholder such as an ER collet chuck and verify runout before running. Do not use in manual or non-interpolating setups. Follow the tooling manufacturer and machine builder guidelines for spindle speed, feed rate, and depth of cut for solid carbide thread mills in the work material.