Harvey Tool 70086-C3 Thread Mill 1/2-20 6 Flute Solid Carbide

Product Description

The HARVEY TOOL 70086-C3 is a solid carbide helical flute thread mill designed for cutting 1/2-20 UNF threads in both internal and external configurations. With 6 flutes and an AlTiN coating, this tool delivers efficient chip evacuation and heat resistance during high-speed threading operations. The 0.3700-inch cutting diameter and 1.0000-inch length of cut make it well-suited for threading applications requiring precise thread geometry. The 3/8-inch (0.3750-inch) shank provides a secure grip in standard collet or end mill holders. This tool is typically installed and operated by machinists and CNC programmers working in precision metalworking environments.

This thread mill is built for use in CNC machining centers performing internal and external thread milling on workpieces with a minimum nominal diameter of 0.5000 inch. It handles 1/2-20 UNF thread profiles at 20 teeth per inch, making it a practical choice for aerospace, automotive, medical, and general metalworking applications where thread milling is preferred over tapping. The 3.5000-inch overall length accommodates moderate reach requirements without sacrificing rigidity.

Key Features

• Cuts internal and external 1/2-20 UNF threads in a single tool
• 6-flute helical design promotes efficient chip removal and improved surface finish
• AlTiN coating provides heat and wear resistance for extended tool life in ferrous materials
• Solid carbide construction delivers rigidity and dimensional accuracy
• No coolant-through design — compatible with standard flood or mist coolant delivery
• 3.5000-inch overall length with 1.0000-inch length of cut for versatile reach

Compatibility

Designed as an OEM-style thread milling solution for CNC machining centers using standard 3/8-inch collet or end mill holders, suitable for applications requiring 1/2-20 UNF internal or external thread profiles with a minimum nominal diameter of 0.5000 inch.

Installation Notes

Installation and operation should be performed by a qualified machinist or CNC programmer. Ensure the spindle is fully stopped and the machine is powered down before loading or unloading the tool from its holder. Verify runout in the holder before threading operations, as excessive runout will degrade thread quality and reduce tool life. Follow the tool manufacturer guidelines and machine builder recommendations for speeds and feeds appropriate to the workpiece material.