Harvey Tool 20384-C3 Micro Drill Bit Wire 51 Carbide

Product Description

The HARVEY TOOL 20384-C3 is a solid carbide micro drill bit designed for precision drilling in small-diameter applications. It carries a wire size designation of 51, corresponding to a decimal diameter of 0.0670 inches. The 130-degree split point geometry promotes accurate entry and reduces walking on hard or smooth surfaces. An AlTiN coating improves heat resistance and extends tool life in abrasive and harder materials. This bit features a right-hand spiral flute for efficient chip evacuation. It is intended for use by machinists, tool and die makers, and precision metalworking shops requiring consistent performance at miniature drill sizes.

The 20384-C3 is suited for precision drilling in metals, composites, and other hard materials where small-diameter, tight-tolerance holes are required. With an overall length of 1.5 inches and a 1/8-inch shank diameter, it fits standard collet chucks and drill chucks common in CNC machining centers, drill presses, and precision hand-held spindles. The 0.4130-inch flute length accommodates shallow to moderate depth drilling typical in miniature component manufacturing and mold work.

Key Features

• Wire size 51 with 0.0670-inch decimal diameter for precise small-hole drilling
• 130-degree drill point angle reduces skating and improves entry accuracy
• AlTiN coating enhances wear resistance and thermal stability in hard materials
• Right-hand cut spiral flute promotes chip clearance and reduces heat buildup
• Solid carbide construction provides rigidity and dimensional stability at miniature sizes
• 1/8-inch shank diameter compatible with standard collet and drill chuck tooling

Compatibility

Designed as an OEM-style miniature drill bit for use in standard 1/8-inch collet chucks and compatible drill chuck tooling on CNC machining centers and precision drill presses.

Installation Notes

Installation and use of this tool should be performed by qualified machinists familiar with small-diameter tooling. Ensure the machine spindle and chuck are fully de-energized and at rest before tool changes. Verify collet or chuck runout is within specification before use, as excessive runout accelerates wear and breakage at micro drill diameters. Use appropriate cutting speeds and feeds for the workpiece material and avoid side loading, which can fracture carbide at this diameter.