Harvey Tool 20245 Micro Drill Bit No. 68 Solid Carbide

Product Description

The HARVEY TOOL 20245 is a solid carbide micro drill bit designed for precision drilling in small-diameter applications. This bit carries a No. 68 wire gauge size, equivalent to 0.0310 inches (1/32 inch nominal), with a 130-degree point angle optimized for accurate entry and reduced walking on hard materials. The overall length is 1.5000 inches, and the flute length measures 0.3950 inches. Built from solid carbide, the 20245 delivers the rigidity and wear resistance required when drilling tight-tolerance holes in metal, composite, and hard plastic workpieces. It features a right-hand spiral flute and a bright, uncoated finish. Machinists and toolroom technicians are the primary installers of this bit.

This bit is suited for CNC machining centers, drill presses, and precision hand-held spindle tools where small-bore hole generation is required. Common applications include circuit board drilling, instrument component manufacturing, watch and medical device component work, and any operation demanding repeatable accuracy at sub-1/8-inch diameters. The 1/8-inch shank diameter allows compatibility with standard collet and chuck systems found on benchtop and production machines. It is part of the Harvey Tool Miniature Drills series, which targets high-precision, small-feature machining environments.

Key Features

• Solid carbide construction for rigidity and extended tool life in hard materials
• No. 68 wire gauge size at 0.0310 inches for precise small-bore drilling
• 130-degree point angle reduces drill walking and improves entry accuracy
• Right-hand spiral flute promotes chip evacuation in deep or blind holes
• Bright, uncoated finish suitable for a wide range of base materials
• 1/8-inch shank fits standard collets and chucks without an adapter

Compatibility

Designed as an OEM-style replacement or standard tooling selection for CNC machining centers, drill presses, and precision spindle tools equipped with 1/8-inch collets or chucks accepting miniature carbide drill bits.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with small-diameter carbide tooling. Ensure the spindle is fully stopped and the machine is powered down before changing or seating the bit in the collet or chuck. Solid carbide bits are brittle — avoid side-loading, excessive feed rates, or using drill chucks that cannot hold the shank concentrically, as runout will fracture the bit at small diameters. Follow machine manufacturer specifications for spindle speed and feed rate when running micro-diameter drills.