Accupro A-6100166R Micro Drill Bit 1.66 Mm Solid Carbide

Product Description

The ACCUPRO A-6100166R is a solid carbide micro drill bit designed for precision drilling in miniature and small-bore applications. It features a 1.66 mm (0.0654 inches) cutting diameter, a 120-degree drill point angle, and a bright/uncoated finish that reflects its unmodified carbide substrate. The straight-cylindrical shank measures 2.00 mm in diameter, and the overall length is 38.00 mm. The spiral flute geometry promotes chip evacuation during drilling. This bit is suited for machinists, toolmakers, and precision fabricators working on tight-tolerance holes in metal, composite, or similar materials.

The A-6100166R fits into miniature drilling operations where small hole diameters and tight positional tolerances are required. Typical applications include instrument manufacturing, electronics assembly fixtures, mold and die work, and precision machining of small components. The right-hand cutting direction is standard for conventional CNC and manual drill press setups. The 12.00 mm flute length limits engagement depth, making this bit best suited for shallow-to-moderate hole depths relative to diameter.

Key Features

• 1.66 mm (0.0654 inches) cutting diameter for precision micro-bore work
• 120-degree point angle for standard material entry and centering
• Solid carbide construction for rigidity and wear resistance in hard materials
• Bright/uncoated finish — no coating buildup that could affect dimensional accuracy
• Straight-cylindrical shank compatible with standard collets and drill chucks
• Regular spiral flute type with right-hand cutting direction

Compatibility

Designed as a miniature-series replacement or standard-supply drill bit for use in collet systems and drill chucks accepting a 2.00 mm straight-cylindrical shank.

Installation Notes

Installation of micro drill bits should be performed by qualified machinists or toolroom technicians. Ensure the drill chuck or collet is clean and properly torqued before use to prevent runout that can snap small-diameter carbide tooling. Solid carbide bits are brittle — avoid side loading and verify spindle alignment before engaging the workpiece. Power down the machine and confirm zero motion before changing or seating the bit.