Accupro A-6120104R Micro Drill Bit Size 59 1.04 Mm Carbide

Product Description

The ACCUPRO A-6120104R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. It carries a wire gauge size of 59, equivalent to 1.04 mm (0.0409 inches) in diameter. The 120-degree drill point angle delivers clean entry and reduces walking on hard or brittle materials. A bright, uncoated finish keeps the carbide substrate exposed, making it well suited for non-ferrous metals, plastics, printed circuit boards, and other materials where coatings may interfere with surface chemistry. This bit is installed and operated by machinists, toolmakers, and precision fabricators working with CNC drilling equipment, drill presses, or precision hand tools requiring miniature tooling.

This drill bit fits within the miniature series and is appropriate for small-diameter, high-precision drilling tasks found in electronics manufacturing, watchmaking, medical device fabrication, and fine metalworking. Its straight-cylindrical shank with a 1.50 mm shank diameter seats securely in standard collets and chucks sized for miniature tooling. The 30 mm overall length keeps the tool compact and rigid, reducing deflection during operation. Right-hand cutting direction is standard for the majority of drilling setups.

Key Features

• Solid carbide construction provides hardness and wear resistance for precision micro drilling
• Wire size 59 with 1.04 mm diameter and 0.0409-inch decimal equivalent for tight-tolerance work
• 120-degree standard point angle minimizes drill walking and improves entry accuracy
• Bright, uncoated finish suitable for non-ferrous metals, plastics, and PCB materials
• Spiral flute with regular spiral type aids chip evacuation in shallow micro-holes
• Straight-cylindrical shank at 1.50 mm diameter for secure collet or chuck seating

Compatibility

Designed as an OEM-style miniature drill bit compatible with CNC machining centers, drill presses, and precision drilling equipment fitted with collets or chucks accepting a 1.50 mm straight-cylindrical shank.

Installation Notes

This tool is installed by machinists and precision fabricators in collet-style toolholders or drill chucks rated for miniature tooling. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the shank fully within the collet to the manufacturer-specified grip length to prevent runout. Micro drill bits are brittle at small diameters — avoid side loading, excessive feed pressure, or using this bit in handheld rotary tools not designed for precision micro drilling.