Harvey Tool 901210-C3 Thread Mill 40-48 Tpi 2 Flute Carbide

Product Description

The HARVEY TOOL 901210-C3 is a single profile thread mill designed for cutting both internal and external threads in the 40 to 48 TPI range, covering thread sizes 4-40 through 4-48. Built from solid carbide and finished with an AlTiN coating, this tool delivers thermal resistance and edge wear performance across a variety of workpiece materials. The cutting diameter is 0.08 inches with a neck diameter of 0.04 inches, and the shank measures 0.1875 inches in diameter. Overall length is 2 inches. With 2 flutes, this tool suits CNC machining centers where precise thread helical interpolation is required. It is suited for machinists working in tight tolerances on small-diameter threaded features.

This thread mill is used in CNC machining applications where a single tool must produce multiple thread pitches in the 40 to 48 TPI range without a tool change. It is applicable to both internal and external thread forms, making it efficient for shops producing small fastener threads in aluminum, steel, titanium, and similar materials. The neck length of 0.625 inches allows access to moderate-depth thread features. It is commonly used in precision manufacturing environments including aerospace, medical device, and general machining.

Key Features

• Covers 40 to 48 TPI range, accommodating 4-40 and 4-48 thread sizes in a single tool
• Machines both internal and external threads with one tool via helical interpolation
• Solid carbide construction for rigidity and dimensional stability in demanding materials
• AlTiN coating improves heat resistance and extends tool life in dry or semi-dry cutting
• 0.04-inch neck diameter allows entry into small-bore thread features
• 2-flute geometry balances chip evacuation and cutting stability at small diameters

Compatibility

Designed as an OEM-style replacement or direct-use thread milling tool for CNC machining centers capable of helical interpolation with a 0.1875-inch tool holder or collet.

Installation Notes

Installation is performed by a machinist or CNC setup technician using a collet or end mill holder sized for a 0.1875-inch shank. Ensure the spindle is fully stopped and the machine is in a safe state before loading or unloading the tool. Thread milling with this tool requires a CNC control capable of helical interpolation; consult the machine control documentation and the tool manufacturer feed and speed data before programming. Inspect the cutting edge for chipping before each use given the small neck diameter.