Accupro A-6120155R Micro Drill Bit 1.55mm Solid Carbide

Product Description

The ACCUPRO A-6120155R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. The bit measures 1.55 mm (0.0610 inches) in diameter with a 120-degree drill point angle and a 38.00 mm overall length. Solid carbide construction provides the rigidity and wear resistance required when drilling small-diameter holes in hard or abrasive materials. The bright, uncoated finish means no coating variability, making it a straightforward choice for machinists who need consistent, measurable performance in miniature drilling operations.

This micro drill bit is suited for precision machining work including PCB drilling, small-component fabrication, watchmaking, medical device manufacturing, and instrument tooling. The miniature series designation places it firmly in high-precision, close-tolerance environments where standard-size bits are too large. A straight-cylindrical shank with a 2.00 mm diameter ensures compatibility with collet chucks and precision drill chucks commonly found on CNC machining centers, drill presses, and manual milling machines. Right-hand cutting direction is standard for conventional spindle rotation setups.

Key Features

• Solid carbide construction for rigidity and extended tool life in hard materials
• 1.55 mm (0.0610 inch) drill diameter with 120-degree point angle for precise entry
• 38.00 mm overall length with 7.20 mm flute length suited to shallow micro-hole applications
• Spiral flute, regular spiral type for efficient chip evacuation in small-diameter bores
• Bright/uncoated finish — no coating variation, consistent dimensional performance
• Straight-cylindrical shank, 2.00 mm diameter, compatible with standard collet and precision chuck systems

Compatibility

Designed as an OEM-style miniature drill bit for use in collet chucks and precision drill chucks accepting a 2.00 mm straight-cylindrical shank, suitable for CNC machining centers, drill presses, and manual milling setups requiring micro-diameter drilling capability.

Installation Notes

Micro drill bits should be installed and operated by machinists or tooling technicians familiar with small-diameter tooling practices. Secure the shank fully in a precision collet or drill chuck and verify runout before operation, as even minor runout will cause breakage at this diameter. Power down and lock out the machine spindle before changing tooling. Avoid side loading or peck drilling at excessive feed rates, as solid carbide micro bits are brittle and will snap under lateral stress.