Harvey Tool 896428-C6 Thread Mill 8-32 3 Flute Solid Carbide

Product Description

The HARVEY TOOL 896428-C6 is a solid carbide helical flute thread mill designed to cut 8-32 unified coarse threads in both internal and external applications. It features 3 flutes and a 0.1260-inch cutting diameter with a 1/4-inch (0.2500-inch) shank. The tool carries an AlTiN Nano coating that improves wear resistance and heat dissipation during high-speed threading operations. With a 0.0938-inch length of cut and a 2.5-inch overall length, this tool is engineered for precision thread milling in CNC machining centers. It is installed by machinists and tool-and-die professionals working with ferrous and non-ferrous materials.

This thread mill is suited for job shops, production machining environments, and toolrooms requiring reliable 8-32 thread generation. Because it handles both internal and external thread profiles, a single tool covers through-hole, blind-hole, and external fastener thread applications. The 32 TPI pitch and 0.1640-inch minimum nominal diameter make it appropriate for small-bore threaded features common in precision mechanical assemblies, aerospace components, and instrumentation hardware. No coolant-through capability is present, so flood or mist coolant should be applied externally during operation.

Key Features

• Cuts both internal and external 8-32 unified coarse threads with a single tool
• AlTiN Nano coating extends tool life and supports elevated cutting temperatures
• 3-flute helical geometry improves chip evacuation and surface finish in threaded features
• Solid carbide construction provides rigidity and dimensional stability in small-diameter threading
• 0.0938-inch length of cut accommodates shallow threaded features and tight-clearance bores
• 1/4-inch shank diameter is compatible with standard collet chucks and end mill holders

Compatibility

Designed as an OEM-style thread milling solution for CNC machining centers equipped with standard 1/4-inch collet or end mill holder tooling systems capable of helical interpolation.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation; confirm machine compatibility before programming. Secure the shank fully into a balanced collet chuck or shrink-fit holder to minimize runout at the small cutting diameter. Power down and lock out the spindle before tool changes. Do not use this tool in manual milling operations or non-interpolating setups.