Scientific Cutting Tools SPTM098 Thread Mill 6-32 to 6-64

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM098 is a single profile thread mill designed to cut both internal and external threads in the #6-32 to #6-64 range, covering 32 to 64 TPI in a single tool. Built from submicron-grade solid carbide with a bright uncoated finish, it features 3 flutes and a 0.098-inch cutting diameter with a reduced 0.049-inch neck diameter for clearance in tight bores. Overall length is 2 inches with a 3/16-inch shank. This tool is intended for use by machinists and CNC programmers in precision machining environments where a single cutter must handle a range of fine thread pitches without a tool change.

The SPTM098 is suited for threading operations on small-diameter holes and bosses in ferrous and non-ferrous materials where close-tolerance thread profiles are required. Its single-profile geometry allows the operator to adjust the programmed thread pitch at the controller, making it practical for job shops and production cells that run varied thread specifications in the #6 screw size range. The 0.25-inch length of cut accommodates standard thread engagement depths for this fastener class in both through-hole and blind-hole applications.

Key Features

• Cuts internal and external threads from #6-32 to #6-64 with one tool
• Submicron-grade solid carbide construction for wear resistance and edge stability
• 0.049-inch neck diameter provides radial clearance in small-bore threading
• 3-flute design balances chip evacuation with cutting edge count at small diameters
• Bright uncoated finish suitable for a broad range of workpiece materials
• 0.25-inch length of cut matches typical thread engagement for #6-class fasteners

Compatibility

Designed for use in CNC machining centers and CNC milling machines capable of helical interpolation; compatible with standard 3/16-inch collet or end mill holders.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation - confirm controller compatibility before setup. Secure the 3/16-inch shank in a properly sized, clean collet or shrink-fit holder to minimize runout, as runout directly affects thread form accuracy at this diameter. Power down the spindle and follow lockout procedures before loading or inspecting the tool. Do not use this tool in manual milling machines or hand-held applications.