Harvey Tool 959506-C6 Thread Mill 56-64 Tpi 3 Flute Carbide

Product Description

The HARVEY TOOL 959506-C6 is a single profile thread mill designed to cut both internal and external threads in the 2-56 to 2-64 thread size range, covering 56 to 64 TPI. Built from solid carbide and finished with an AlTiN Nano coating, this tool delivers reliable performance in hardened and abrasive materials. The cutting diameter is 0.064 inches, the neck diameter is 0.041 inches, and the shank diameter is 0.125 inches. With three flutes and a 1.5 inch overall length, it is suited for precision threading operations on small-diameter features in a CNC machining environment.

This thread mill is used in applications requiring tight-tolerance threads at small diameters, typical in aerospace, medical device, and precision instrument manufacturing. It handles both internal and external thread profiles in a single tool, reducing setup time when both thread types appear in the same part. The 0.3125 inch neck length provides clearance for blind-hole threading without interference. Machinists working on production or prototype runs of small-component assemblies will find this geometry appropriate for fine-pitch work in the 2-56 to 2-64 range.

Key Features

• Cuts internal and external threads in a single tool - covers 2-56 through 2-64 thread sizes
• Solid carbide construction for rigidity and wear resistance in hard or abrasive workpiece materials
• AlTiN Nano coating reduces heat buildup and extends tool life at elevated cutting speeds
• Three-flute design balances chip evacuation with cutting stability at small diameters
• 0.041 inch neck diameter provides clearance for blind-hole and close-tolerance threading
• Single profile geometry allows thread size adjustment via CNC toolpath offset without changing tools

Compatibility

Designed as an OEM-style replacement or direct-use thread mill for CNC machining centers capable of helical interpolation, suited for fine-pitch threading applications in the 2-56 to 2-64 thread size range.

Installation Notes

Installation and use should be performed by a qualified CNC machinist familiar with thread milling toolpaths and helical interpolation cycles. Secure the shank in a collet or tool holder rated for the 0.125 inch shank diameter, and verify runout before cutting. Always confirm the machine spindle is stopped and the tool is clear of the workpiece before making any tool changes or adjustments. Follow the tool manufacturer and machine builder guidelines for feed rate, speed, and coolant strategy when thread milling at fine pitches.