Harvey Tool 17364-C3 Thread Mill 3/8-16 4 Flute Solid Carbide

Product Description

The HARVEY TOOL 17364-C3 is a solid carbide helical flute thread mill designed for cutting 3/8-16 unified coarse threads in both internal and external applications. Built with 4 flutes and an AlTiN coating, it handles the heat and abrasion demands of production milling environments. The shank diameter is 0.3125 inches with a cutting diameter of 0.2850 inches, a length of cut of 0.7500 inches, and an overall length of 3.0000 inches. Coolant-through capability supports chip evacuation and tool life in deep or tight thread-milling passes. This tool is sized for machinists and CNC operators working in job shops, production facilities, or toolroom environments.

This thread mill is suited for cutting 3/8-16 threads at 16 teeth per inch in a range of workpiece materials where AlTiN coating provides thermal protection. Internal thread milling in through-holes and blind holes is a primary application, along with external thread milling on cylindrical features. The minimum nominal thread diameter is 0.3750 inches. It is appropriate for use in CNC machining centers running helical interpolation routines, and is typically selected when single-point threading or tapping is impractical due to material hardness or thread tolerance requirements.

Key Features

• Cuts 3/8-16 unified coarse threads — internal and external in a single tool
• 4-flute helical geometry for stable chip load distribution
• AlTiN coating for heat resistance and extended tool life in hard or abrasive materials
• Coolant-through design aids chip evacuation and reduces heat at the cutting edge
• Solid carbide construction provides rigidity and dimensional consistency
• 0.3125 inch shank diameter fits standard collet and end mill holders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation, with a 0.3125 inch shank compatible with standard ER collets and end mill tool holders. Cuts 3/8-16 UNC thread forms on internal and external features with a minimum nominal diameter of 0.3750 inches.

Installation Notes

Installation and operation should be performed by a qualified CNC machinist or toolroom professional. Secure the shank in a properly sized collet or end mill holder and verify runout before cutting. Confirm that the machining center is programmed for helical interpolation at the correct thread pitch before engaging the workpiece. Engage coolant-through supply when available to maximize chip clearing and tool life.