Scientific Cutting Tools SPTM120MLA Thread Mill 8-32 to 8-56

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM120MLA 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+ coating, it delivers consistent thread geometry and extended tool life in demanding machining environments. The 3-flute design balances chip evacuation with rigidity. With a 0.12-inch cutting diameter and 0.40-inch length of cut, this tool is suited for small-diameter thread milling on CNC machining centers where precision and repeatability are critical.

This thread mill is used in precision machining applications requiring fine unified threads in the #8 size range. It is appropriate for both production and job-shop environments where a single tool must handle a span of thread pitches without a tool change. Typical applications include threading holes and external bosses in aluminum, steel, stainless, and similar machinable alloys. The compact neck diameter of 0.07 inches allows access to deeper thread features relative to the cutting zone. Machinists and CNC operators in aerospace, medical device, and general precision machining shops regularly reach for this class of tool.

Key Features

• Mills threads from #8-32 to #8-56 with a single tool, covering 32 to 56 TPI
• Internal and external thread capability in one profile
• Submicron-grade solid carbide blank for rigidity and wear resistance
• AlTiN+ coating improves heat resistance and extends tool life in ferrous and non-ferrous materials
• 3-flute geometry balances cutting forces and chip clearance at small diameters
• Reduced neck diameter of 0.07 inches enables reach into tighter thread features

Compatibility

Designed as an OEM-style single profile thread mill for use in CNC machining centers capable of helical interpolation and accepting a 3/16-inch shank diameter toolholder.

Installation Notes

Thread milling with this tool requires a CNC machining center programmed for helical interpolation. Confirm that the toolholder collet or chuck is rated for the 3/16-inch shank diameter and that runout is minimized before cutting, as excessive runout at this diameter will directly affect thread quality. Always verify spindle speed and feed rate parameters against the tool manufacturer recommendations for the specific workpiece material before engaging the cut. Handle solid carbide tooling carefully to avoid edge chipping during setup.