Accupro A-6120022R Micro Drill Bit Wire 90 Solid Carbide

Product Description

The ACCUPRO A-6120022R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Sized to wire gauge 90 with a decimal diameter of 0.0087 inches, this bit operates at a 120-degree point angle with a standard point type. The spiral flute geometry promotes chip evacuation in small-diameter holes. At 25 mm overall length with a 1.10 mm flute length and a 1.00 mm straight-cylindrical shank, this bit fits standard micro drill chucks. Right-hand cutting direction and bright uncoated finish are suited to non-ferrous metals, printed circuit boards, and similar fine-detail substrates. Installed by machinists, tool and die makers, and electronics assembly technicians.

This miniature series drill bit is used in applications requiring precise, repeatable small-diameter holes. Typical settings include PCB fabrication, watchmaking, medical device manufacturing, and precision instrument assembly. The solid carbide construction maintains edge integrity at high spindle speeds typical of micro drilling operations. No coolant-through capability is present, so external coolant or dry cutting conditions apply depending on the workpiece material.

Key Features

• Wire gauge 90 diameter — 0.0087 inches decimal equivalent
• 120-degree standard point angle for accurate entry and reduced walking
• Solid carbide construction for rigidity and edge retention in fine-diameter work
• Spiral flute design promotes chip clearing in deep micro holes
• Bright uncoated finish compatible with non-ferrous and composite materials
• Straight-cylindrical shank fits standard micro drill chucks and collets

Compatibility

Designed for use in standard micro drill chucks and collets accepting a 1.00 mm straight-cylindrical shank, suitable for bench-top CNC machines, micro drill presses, and precision hand-piece tools used in electronics and instrument manufacturing.

Installation Notes

Installation is performed by machinists or precision assembly technicians. Secure the shank fully in the collet or chuck before operation and verify runout before drilling. At this diameter, excessive feed pressure or off-axis load will cause bit breakage — use a controlled, low-vibration spindle. External coolant or cutting fluid may be applied depending on substrate; no coolant-through passage is present in this bit.