Harvey Tool 20230-C3 Micro Drill Bit Size 70 Solid Carbide

Product Description

The HARVEY TOOL 20230-C3 is a solid carbide micro drill bit designed for precision drilling in small-diameter applications. Built to wire gauge size 70, this bit measures 0.028 inches in diameter and features a 130-degree split point angle for accurate positioning and reduced walking on entry. The AlTiN coating provides heat resistance and extends tool life in harder workpiece materials. At 1.5 inches overall length with a 0.335-inch flute length and a 1/8-inch shank diameter, this bit fits standard miniature drill chucks. Right-hand spiral flute geometry clears chips efficiently during through-hole and blind-hole operations.

This micro drill bit is suited for machining operations requiring tight tolerances in small-bore applications. It is used in precision manufacturing, electronics fabrication, mold and die work, and instrumentation components where standard drill sizes are too large. The spiral flute design handles a range of workpiece materials including hardened steels, stainless, and nonferrous alloys when paired with appropriate feed and speed parameters. Machinists, tool and die makers, and precision CNC operators are the typical end users for this size class.

Key Features

• Wire gauge size 70 diameter - 0.028 inches - for micro-scale precision drilling
• 130-degree drill point angle reduces entry deflection and improves hole location accuracy
• AlTiN coating extends tool life and improves performance in abrasive and hardened materials
• Solid carbide construction provides rigidity and wear resistance at small diameters
• Right-hand spiral flute promotes efficient chip evacuation in through and blind holes
• 1/8-inch shank diameter fits standard miniature collets and chucks

Compatibility

Designed as a miniature series micro drill for use in CNC machining centers, drill presses, and manual mills equipped with collets or chucks accepting a 1/8-inch shank diameter.

Installation Notes

Installation and use of this micro drill bit should be performed by a qualified machinist familiar with small-diameter tooling requirements. Secure the 1/8-inch shank firmly in a collet or chuck rated for the shank size before operation. At 0.028-inch diameter, this bit is highly susceptible to breakage from excessive feed rate, runout, or lateral force - verify spindle runout is within acceptable limits for the diameter class before drilling. Power down the machine and follow lockout procedures before changing tooling.