Harvey Tool 959550-C6 Thread Mill 1/4-20 to 1/4-32 Solid Carbide

Product Description

The HARVEY TOOL 959550-C6 is a solid carbide single profile thread mill designed to cut both internal and external threads in the 1/4-20 to 1/4-32 range, covering 20 to 32 TPI. With a 0.18-inch cutting diameter and a 1/4-inch shank, this tool is built for precision threading on CNC machining centers. The AlTiN Nano coating extends tool life in abrasive materials and elevated cutting temperatures. Five flutes provide chip clearance and surface finish quality expected in production and job shop environments. It is used by machinists and CNC operators working on threaded features in ferrous and non-ferrous workpiece materials.

This thread mill is suited for shops requiring a single tool that handles both internal and external thread profiles across the 1/4-inch thread size range. At 2.5 inches overall length with a 1.0-inch neck length and 0.122-inch neck diameter, it reaches into blind holes and tight-clearance features without interference. It is appropriate for aerospace, automotive, medical, and general precision machining applications where thread form accuracy and repeatability across a TPI range are required.

Key Features

• Cuts internal and external threads — single tool covers both applications
• Thread range of 1/4-20 to 1/4-32 (20 to 32 TPI) from one profile
• AlTiN Nano coating for heat and wear resistance in demanding materials
• 5-flute geometry for improved chip evacuation and finish quality
• Solid carbide construction for rigidity and dimensional stability
• 0.122-inch neck diameter enables reach into confined thread features

Compatibility

Designed for use in CNC machining centers with standard 1/4-inch toolholding. Suitable for threading operations in the 1/4-20 through 1/4-32 thread size range on internal and external features.

Installation Notes

Installation and operation by qualified CNC machinists is required. Secure the 1/4-inch shank in a collet chuck or end mill holder with appropriate runout specifications for thread milling. Power down and lock out the spindle before tool changes. Program thread milling cycles using helical interpolation on a 3-axis or greater CNC machining center — do not use this tool in a manual or drill press application.