Scientific Cutting Tools SPTM080LA Thread Mill 40-64 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM080LA is a single profile thread mill designed for cutting internal and external threads in the 4-40 to 4-64 range, spanning 40 to 64 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 tool features a 0.08-inch cutting diameter, a 0.045-inch neck diameter, and a 0.30-inch length of cut, making it well suited for small-diameter thread milling where clearance is limited. Three flutes provide efficient chip evacuation and a stable cutting edge in CNC machining environments.

This thread mill is intended for use on CNC machining centers where helical interpolation is available. It handles both internal and external thread profiles, reducing the need to swap tooling between operations. The compact cutting geometry and extended neck make it appropriate for threading into shallow or tight-access bores typical of small fastener applications in precision manufacturing, aerospace, medical device, and electronics assembly work. The 3/16-inch shank diameter suits standard collet and end mill holders common in these environments.

Key Features

• Cuts internal and external threads in a single tool - 40 to 64 TPI range covering 4-40 and 4-64 thread sizes
• Submicron-grade solid carbide construction for rigidity and wear resistance in demanding materials
• AlTiN+ coating improves heat resistance and extends tool life in dry or semi-dry cutting conditions
• 0.045-inch neck diameter allows access in tight-bore and small-diameter applications
• Three-flute geometry promotes chip clearance and cutting stability at CNC spindle speeds
• Single profile design enables thread pitch changes via CNC program adjustment without changing tooling

Compatibility

Designed for use in CNC machining centers capable of helical interpolation. Fits standard 3/16-inch collet chucks and end mill holders. Suitable for threading 4-40 and 4-64 thread forms in both internal and external applications.

Installation Notes

Thread milling requires helical interpolation support in the CNC control - confirm program compatibility before use. Secure the 3/16-inch shank in a properly sized, clean collet or toolholder and verify runout before cutting. Follow the tool manufacturer and machine tool builder guidelines for feeds, speeds, and coolant strategy appropriate to the workpiece material. Handle solid carbide tooling carefully to avoid edge chipping from impact or improper storage.