Harvey Tool 73012-C3 Square End Mill 0.3mm 4 Flute Carbide

Product Description

The HARVEY TOOL 73012-C3 is a miniature square end mill designed for precision milling in tight-tolerance applications. Built from solid carbide, this single-end tool features a 0.3 mm (0.0120 inch) cutting diameter and a 4-flute geometry with a 30-degree right-hand helix. The AlTiN coating provides heat resistance and extended tool life when machining ferrous and hardened materials. With a length of cut of 0.036 inches and an overall length of 1.5 inches, this end mill is suited for detailed work in CNC machining centers where dimensional accuracy and surface finish are critical. It is centercutting and runs in a right-hand cutting direction.

This end mill is used in precision CNC milling operations across aerospace, medical device, die and mold, and electronics manufacturing applications. Its micro-diameter profile makes it appropriate for fine-detail slotting, profiling, and finishing passes in small cavities or thin-wall features. The 1/8 inch shank diameter fits standard collet systems common to vertical and horizontal machining centers. It is typically installed and run by CNC machinists and tool-and-die professionals working in close-tolerance environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cuts
• AlTiN coating for thermal protection and extended tool life on ferrous and hardened workpieces
• 0.3 mm (0.0120 inch) cutting diameter for micro and miniature milling operations
• 4-flute, 30-degree right-hand helix for efficient chip evacuation and smooth finishes
• Centercutting geometry allows plunge entry into the workpiece
• 1/8 inch shank diameter for compatibility with standard collet toolholders

Compatibility

Designed for use with standard 1/8 inch collet toolholders on CNC vertical and horizontal machining centers capable of running micro-diameter end mills.

Installation Notes

Installation should be performed by a qualified CNC machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool changer or collet is properly secured before inserting or removing the tool. Use a calibrated collet in good condition sized for 0.125 inch shanks to prevent runout, which is especially critical at this cutting diameter. Verify tool projection length and runout with a dial indicator before initiating a cutting program.