Harvey Tool 956830-C3 Square End Mill 0.03 in 4 Flute Altin

Product Description

The HARVEY TOOL 956830-C3 is a solid carbide square end mill designed for high-precision milling in demanding machining environments. With a 0.03-inch cutting diameter and four flutes, this tool delivers clean, accurate cuts in hardened steels, stainless alloys, and other difficult-to-machine materials. The AlTiN coating provides thermal resistance and extended tool life at elevated cutting temperatures. A 30-degree helix angle promotes smooth chip evacuation and reduces cutting forces. The single-end geometry and right-hand flute and cutting direction make it a standard choice for CNC milling operations requiring tight tolerances at small diameters.

This end mill is suited for micro-milling applications in tool and die, medical device, aerospace, and precision component manufacturing. The extended reach configuration, with a 0.156-inch reach length, allows access to pockets and features with tighter depth requirements. A 1/8-inch shank diameter ensures compatibility with standard collet systems on vertical machining centers and CNC mills. The center-cutting design permits direct plunge entry where needed.

Key Features

• 0.03-inch cutting diameter for fine detail and micro-milling work
• AlTiN coating for heat resistance and longer tool life in ferrous and hardened materials
• 4-flute geometry for improved surface finish and material removal rate
• 30-degree helix angle promotes efficient chip evacuation
• Extended reach design with 0.156-inch reach length for deeper feature access
• Center-cutting capability allows direct plunge milling
• Solid carbide construction for rigidity and dimensional stability at small diameters

Compatibility

Designed for use in CNC vertical machining centers and milling machines equipped with standard collet or end mill holders accepting a 1/8-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully in the collet or tool holder to the recommended grip length and torque the collet nut per the tool holder manufacturer specifications. At 0.03-inch diameter, this tool is highly susceptible to breakage from runout, excessive feed rates, or improper setup — verify runout with a dial indicator before cutting.