Accupro A-6120281R Micro Drill Bit 2.81mm Solid Carbide

Product Description

The ACCUPRO A-6120281R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. It carries a 2.81 mm diameter (0.1106 inch) with a 120-degree point angle and a spiral flute configuration for efficient chip evacuation. The bright, uncoated finish suits general-purpose drilling where coating buildup or heat retention would be a concern. With an overall length of 38 mm and a 3.00 mm straight-cylindrical shank, this bit fits standard collet and chuck setups. It is used by machinists, tool-and-die technicians, and precision fabricators working with CNC equipment or manual drill presses.

This micro drill bit is suited for small-hole work in metalworking, electronics manufacturing, printed circuit board production, mold-making, and other applications that demand consistent hole geometry at sub-4 mm diameters. The miniature series designation indicates it is built for fine-pitch drilling where standard jobber-length bits are not practical. Right-hand cutting direction is standard for conventional drill press and CNC spindle rotation.

Key Features

• 2.81 mm diameter with 0.1106 inch decimal equivalent for precise hole sizing
• 120-degree standard point angle for accurate center entry and reduced walking
• Solid carbide construction provides rigidity and wear resistance in hard materials
• Spiral flute with regular spiral type supports consistent chip removal
• Bright uncoated finish — no coating buildup in gummy or soft materials
• 14 mm flute length with 3.00 mm straight-cylindrical shank for broad collet compatibility

Compatibility

Designed for use in standard collet chucks and drill presses accepting a 3.00 mm straight-cylindrical shank. Suitable for CNC machining centers and manual spindles running right-hand rotation.

Installation Notes

Installation and use of micro drill bits should be performed by qualified machinists or tooling technicians familiar with small-diameter carbide tooling. Power down and lock out the spindle before changing bits. Carbide is brittle — avoid side loading, interrupted cuts without proper feed reduction, or over-tightening the collet beyond the chuck manufacturer specification. Always verify spindle runout before running small-diameter carbide to prevent premature breakage.