Harvey Tool 20355-C3 Micro Drill Bit 0.0571 in Carbide

Product Description

The HARVEY TOOL 20355-C3 is a solid carbide micro drill bit engineered for precision drilling in tight-tolerance applications. It measures 0.0571 inches in diameter with a 130-degree split point that reduces walking and allows clean entry without a center punch in many applications. The AlTiN coating increases surface hardness and heat resistance, extending tool life when drilling abrasive or hardened materials. At 1.5 inches overall length with a 1/8-inch shank, this bit is sized for use in CNC machining centers, drill presses, and precision hand pieces. Machinists and tool and die professionals are the primary users of this style of miniature drill.

This micro drill is suited for high-precision work in metalworking, mold and die, electronics manufacturing, and aerospace component fabrication. The spiral flute geometry promotes chip evacuation in deep or blind holes, which is critical at this diameter to avoid breakage. The 1/8-inch shank diameter makes it compatible with standard collet systems and miniature chuck setups commonly found in CNC and manual precision drilling equipment. Right-hand cut direction is standard for conventional CNC and drill press spindle rotation.

Key Features

• 0.0571-inch drill diameter for micro and miniature hole applications
• Solid carbide construction provides rigidity and wear resistance at small diameters
• AlTiN coating improves heat resistance and extends tool life in abrasive materials
• 130-degree point angle reduces entry thrust and minimizes walk-off
• Spiral flute design promotes chip clearance and reduces breakage risk
• Right-hand cut, compatible with standard CNC and drill press spindle rotation

Compatibility

Designed for use with standard 1/8-inch collet systems and miniature chucks in CNC machining centers, drill presses, and precision hand pieces that accept a 1/8-inch shank.

Installation Notes

This tool should be installed by a qualified machinist familiar with miniature tooling setups. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the 1/8-inch shank firmly in a clean, undamaged collet or chuck to minimize runout, which is especially critical at this diameter. Avoid applying excessive feed pressure, as solid carbide micro drills are brittle and susceptible to breakage if deflected or side-loaded.