Accupro A-6120129R Micro Drill Bit 1.29 Mm Solid Carbide

Product Description

The ACCUPRO A-6120129R is a solid carbide micro drill bit designed for precision drilling in small-diameter applications. With a 1.29 mm cutting diameter (0.0508 inches) and a 120-degree point angle, this bit delivers accurate starts and clean entry holes in tight-tolerance work. The bright/uncoated finish is suitable for use across a range of materials where additional coatings are not required. At 30 mm overall length with a 6 mm flute length, this is a compact tool built for controlled, shallow-depth micro drilling. Machinists, tool-and-die professionals, and precision fabricators working with CNC machines, drill presses, or manual spindles are the primary users.

This micro drill bit fits residential and commercial precision machining applications where small-diameter holes are required. Typical use cases include circuit board fabrication, instrument components, watch parts, medical device manufacturing, and other fine-detail drilling tasks. The miniature series designation indicates this bit is engineered for sub-2 mm work where standard drill geometry would be inappropriate. Right-hand spiral flute geometry promotes efficient chip evacuation during drilling operations.

Key Features

• Solid carbide construction for rigidity and wear resistance in micro-diameter drilling
• 1.29 mm cutting diameter with a 1.50 mm straight-cylindrical shank for secure chuck engagement
• 120-degree standard point angle for accurate hole entry and reduced walking
• Bright/uncoated finish — no additional coating buildup to affect tight dimensional tolerances
• Regular spiral flute design promotes chip clearing in short-flute micro applications
• Right-hand cut direction compatible with standard CNC and manual spindle rotation

Compatibility

Designed for use in CNC machining centers, drill presses, and precision hand spindles accepting a 1.50 mm straight-cylindrical shank. Suitable for micro-drilling operations in the miniature drill bit size range.

Installation Notes

Installation and use of this tool should be performed by qualified machinists familiar with micro-diameter tooling. Ensure the spindle and collet or chuck are clean and free of debris before seating the shank, as runout in the holder is amplified at sub-2 mm diameters. Power down the machine completely before changing tooling. Use appropriate spindle speeds for the workpiece material and bit diameter — consult the machine manufacturer and cutting data references for correct RPM and feed rate ranges.