Scientific Cutting Tools SPTM072LA Thread Mill 48-72 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM072LA is a single profile thread mill designed for cutting internal and external threads in the 3-48 to 3-72 thread size range, spanning 48 to 72 threads per inch. Built from submicron-grade solid carbide and coated with AlTiN+, this tool delivers the hardness and heat resistance required for threading small-diameter features in ferrous and non-ferrous materials. The 3-flute geometry provides chip clearance and stable cutting action at fine pitches. With a 0.072-inch cutting diameter and a reduced 0.040-inch neck diameter, it reaches into confined bore geometries where standard thread mills cannot. Machinists and CNC operators in precision machining, toolroom, and production environments are the primary users of this tool.

This thread mill is suited for small-diameter threading operations on CNC machining centers using helical interpolation. It handles both internal and external thread profiles across the 48 to 72 TPI range without a tool change, reducing cycle time on miniature threaded features. Typical applications include precision instrument components, electronic hardware, medical device parts, and any workpiece requiring fine-pitch threads at the no. 3 screw diameter. The AlTiN+ coating extends tool life in hardened steels and stainless alloys.

Key Features

• Cuts internal and external threads in a single tool pass using helical interpolation
• Thread range: 3-48 to 3-72, covering 48 to 72 TPI
• Submicron-grade solid carbide substrate for rigidity and wear resistance at fine pitches
• AlTiN+ coating provides heat resistance and extended tool life in ferrous and stainless materials
• Reduced 0.040-inch neck diameter allows access to narrow or deep bore geometries
• 3-flute design balances chip evacuation with cutting stability at miniature diameters

Compatibility

Designed for use in CNC machining centers capable of helical interpolation with a 3/16-inch collet or end mill holder. Suitable for threading operations requiring 48 to 72 TPI single profile thread forms in both internal and external configurations at the no. 3 screw diameter.

Installation Notes

This tool is installed by a CNC machinist or toolroom technician using a 3/16-inch precision collet or shrink-fit holder. Ensure the spindle and tool holder are clean and within runout tolerance before seating the shank, as runout errors are amplified at this cutting diameter. Program the tool path using helical interpolation per the machine controller documentation. Confirm coolant delivery is appropriate for the workpiece material and coating type before beginning the threading cycle.