Scientific Cutting Tools SPTM120LA Thread Mill 8-32 to 8-56

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM120LA is a single profile thread mill designed for cutting both internal and external threads in the #8-32 to #8-56 range, covering 32 to 56 TPI. Built from submicron-grade solid carbide and finished with an AlTiN Plus coating, this tool delivers consistent thread geometry and extended tool life in demanding machining environments. The 3-flute design balances chip evacuation with cutting stability, making it a reliable choice for machinists working with small-diameter threaded features in precision components.

This thread mill is suited for use in CNC machining centers where a single tool must produce a range of thread sizes within the #8 thread family. It handles both internal bores and external thread forms, reducing tool changeovers in production runs. Typical applications include aerospace, medical device, and general precision machining where accurate thread profiles and minimal tool deflection are required in small-format workpieces.

Key Features

• Covers #8-32 to #8-56 thread range in a single tool, eliminating the need for multiple taps or dies
• Cuts both internal and external thread forms
• Submicron-grade solid carbide construction for rigidity and wear resistance
• AlTiN Plus coating improves heat resistance and extends tool life in ferrous and hardened materials
• 3-flute geometry promotes efficient chip removal in blind and through-hole applications
• Reduced neck diameter of 0.07 inches allows reach into recessed or deep features

Compatibility

Designed for use on CNC machining centers capable of helical interpolation; compatible with standard 3/16-inch diameter tool holders or collet chucks. Cuts thread profiles in the #8-32 to #8-56 range on internal and external features.

Installation Notes

Thread milling requires a CNC control with helical interpolation capability - confirm machine compatibility before setup. Secure the shank in a precision collet or end mill holder with adequate clamping depth to minimize runout. Always verify programmed thread pitch and helix direction match the intended thread specification before cutting. Inspect the tool for chipping or coating wear between operations, especially when working with hardened materials.