Harvey Tool 73020 Square End Mill 1/64 in 4 Flute Carbide

Product Description

The HARVEY TOOL 73020 is a solid carbide square end mill designed for precision milling in tight-tolerance machining applications. With a 1/64 inch (0.0200 inch) cutting diameter and a 1/16 inch length of cut, this tool is built for micro-scale work where accuracy is critical. The 4-flute geometry with a 30-degree helix angle promotes smooth chip evacuation and stable cutting at small diameters. The micrograin carbide construction provides the edge retention and rigidity needed when working at sub-0.1 inch scales. Machinists and CNC operators use this end mill for detailed profiling, slotting, and finishing passes in ferrous and non-ferrous materials.

This end mill is suited for use on CNC machining centers and precision manual mills where micro-diameter tooling is required. Its 1/8 inch shank diameter allows it to seat in standard collets commonly found in high-speed spindles. The centercutting design permits plunge entry, which adds versatility in complex tool paths. Typical applications include fine detail work in mold and die, medical device components, electronics hardware, and aerospace parts where small-feature geometry must be held to tight tolerances.

Key Features

• 1/64 inch (0.0200 inch) cutting diameter for micro-scale milling
• Solid micrograin carbide construction for edge retention and rigidity
• 4-flute design with 30-degree helix angle for smooth chip flow
• Centercutting geometry allows plunge entry into workpiece
• Right-hand cut and right-hand flute orientation
• Uncoated finish suited for a range of workpiece materials

Compatibility

Designed as a single-end square end mill with a 1/8 inch shank diameter, compatible with standard ER and precision collet systems used in CNC machining centers and high-speed spindles accepting that shank size.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power locked out. Secure the 1/8 inch shank in a matched collet or chuck to the correct clamping torque per the collet manufacturer specification. At micro diameters, even minor runout will accelerate tool wear or cause breakage, so verify runout with a dial indicator before cutting. Handle with care, as carbide tooling at this diameter is brittle and susceptible to chipping if dropped or improperly stored.