Harvey Tool 70044 Thread Mill 1/4-20 3 Flute Solid Carbide

Product Description

The HARVEY TOOL 70044 is a solid carbide helical flute thread mill designed to cut both internal and external 1/4-20 threads in a single pass. With 3 flutes and 20 teeth per inch, this tool delivers clean, accurate thread forms in a wide range of materials. The 0.1800-inch cutting diameter and 0.5000-inch length of cut make it well suited for threading operations where precision and rigidity are critical. At 2.5000 inches overall length with a 0.1875-inch shank diameter, it mounts easily in standard CNC machining centers and is used by machinists and toolroom professionals working in production or prototype environments.

This thread mill is applicable for both internal and external 1/4-20 thread profiles, with a minimum nominal diameter of 0.2500 inches. It is used in CNC milling applications where a single tool must handle multiple thread directions or where tap breakage is a concern in blind holes. The bright, uncoated finish suits dry or light coolant applications. It does not feature through-tool coolant. Typical users include machinists in job shops, aerospace, and general manufacturing.

Key Features

• Cuts internal and external 1/4-20 threads with one tool
• Solid carbide construction for rigidity and wear resistance
• 3-flute helical design for improved chip evacuation
• 20 teeth per inch for precise thread form accuracy
• Bright/uncoated finish suitable for a broad range of materials
• 0.1875-inch shank diameter fits standard CNC toolholders

Compatibility

Designed as a direct-fit thread milling tool for CNC machining centers capable of helical interpolation, applicable to any operation requiring 1/4-20 internal or external thread profiles.

Installation Notes

Thread mills require a CNC machining center with helical interpolation capability. Ensure the toolholder is properly torqued and runout is minimized before threading operations. Program feed rate, stepover, and lead-in according to the machine tool manufacturer and tooling guidelines. Do not use in manual milling operations.