Scientific Cutting Tools TM125-32A Thread Mill 8-32 Unc

Product Description

The SCIENTIFIC CUTTING TOOLS TM125-32A is a straight flute thread mill designed for cutting internal UNC threads in the 8 to 32 size range. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, it delivers the wear resistance and heat tolerance required for production threading in ferrous and hard materials. The tool runs 3 flutes on a 0.125 inch cutting diameter with a 0.355 inch length of cut and mounts on a 0.25 inch shank. Overall length is 2.5 inches. Licensed machinists and CNC operators use this tool for interpolated thread milling on vertical and horizontal machining centers.

This thread mill is suited for internal threading applications in precision machining environments, including job shops, aerospace, medical, and general manufacturing. It is intended for use in through-holes and blind holes where thread milling is preferred over tapping, particularly in materials where tap breakage is a concern or where a single tool must produce a range of thread depths. The 8 to 32 UNC thread form is common in fastener and assembly applications across multiple industries.

Key Features

• Straight flute geometry for internal UNC 8 to 32 thread milling
• Submicron-grade solid carbide substrate for rigidity and edge retention
• AlTiN+ coating for elevated heat resistance and extended tool life in hard and abrasive materials
• 3 flutes on a 0.125 inch cutting diameter for precise thread form control
• 0.25 inch shank diameter for compatibility with standard collet and end mill holders
• No staggered tooth and no coolant-through design; suitable for external coolant delivery

Compatibility

Designed for CNC machining centers capable of helical interpolation; produces internal UNC 8 to 32 threads with a minimum nominal diameter of number 8 using standard thread milling G-code cycles.

Installation Notes

Thread mills are installed by qualified CNC machinists using precision collet chucks or end mill holders appropriate for a 0.25 inch shank. Confirm tool runout before production threading, as excessive runout directly affects thread quality and tool life. Program helical interpolation per the tool manufacturer guidelines for the target thread size and pitch. Verify workpiece is securely fixtured and all spindle parameters are set before engaging the cut.