Scientific Cutting Tools TM080-40A Thread Mill 4-40 Unc

Product Description

The SCIENTIFIC CUTTING TOOLS TM080-40A is a straight flute thread mill designed for cutting internal UNC threads in the 4 to 40 size range. Built from submicron-grade solid carbide and coated with AlTiN+, this tool delivers consistent thread form and extended tool life in ferrous and hardened materials. The 3-flute geometry provides stable cutting action with adequate chip clearance. The 0.08 inch cutting diameter and 0.21 inch length of cut make this tool well suited for small-diameter internal threading operations where rigidity and precision are critical. Shank diameter is 0.25 inches with a 2.5 inch overall length. Installed by machinists and tool and die professionals working on CNC machining centers.

This thread mill is used for internal threading in small-hole applications on CNC machining centers with helical interpolation capability. The straight flute design is appropriate for through-hole and shallow blind-hole threading where chip evacuation is manageable without coolant-through capability. Typical applications include producing 4-40 UNC threaded features in aluminum, steel, stainless steel, and similar machinable alloys. The AlTiN+ coating adds heat resistance and surface hardness, making the tool effective in dry or semi-dry cutting conditions common in production environments.

Key Features

• Submicron-grade solid carbide blank for high rigidity and wear resistance in small-diameter tooling
• AlTiN+ coating improves heat resistance and tool life in ferrous and abrasive materials
• 3 straight flutes provide stable cutting geometry for 4-40 UNC internal thread milling
• 0.08 inch cutting diameter and 0.21 inch length of cut sized for small-hole thread milling
• 0.25 inch shank diameter for standard ER or set-screw toolholders on CNC machining centers
• No coolant-through requirement simplifies setup in standard spindle configurations

Compatibility

Designed for use in CNC machining centers capable of helical interpolation for cutting 4 to 40 UNC internal threads in workpieces requiring small-diameter thread milling.

Installation Notes

This tool is installed and operated by machinists on CNC machining centers using helical interpolation cycles. Secure the 0.25 inch shank in a properly sized, clean toolholder and verify runout before beginning a thread milling operation. Do not use this tool in manual or non-interpolating machine setups. Follow all shop safety protocols and machine-specific feed and speed recommendations from the manufacturer when programming thread mill cycles.