Accupro A-6100031R Micro Drill Bit 0.31 Mm Solid Carbide

Product Description

The ACCUPRO A-6100031R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Built to a 0.31 mm diameter (0.0122 inches decimal equivalent), it features a 120-degree standard point angle and a spiral flute with right-hand cutting direction. The bright uncoated finish suits applications where coating buildup or contamination is a concern. At 25 mm overall length with a 1.00 mm straight-cylindrical shank, this bit belongs to the Miniature series and is intended for machinists, tool and die makers, and precision fabricators working with small-diameter holes in PCB, medical, aerospace, or fine mechanical assemblies.

This micro drill bit is suited for use in CNC machining centers, drill presses, and precision hand-held spindles where extremely small bore diameters are required. The 2.80 mm flute length accommodates shallow-depth micro holes. Its solid carbide construction makes it appropriate for drilling hardened steels, composites, ceramics, and other abrasive materials where high-speed steel tooling would wear prematurely. Machinists and precision fabricators are the primary installers and users of this tooling.

Key Features

• Solid carbide construction for extended tool life in abrasive and hard materials
• 0.31 mm diameter with 120-degree standard point angle for accurate entry and reduced walking
• Spiral flute design promotes chip evacuation in micro-diameter drilling
• Bright uncoated finish suitable for applications where coating interaction is a concern
• Straight-cylindrical shank at 1.00 mm diameter for compatibility with standard micro collets and chucks
• Right-hand cut with regular spiral type for conventional drilling operations

Compatibility

Designed as an OEM-style micro drill bit replacement for precision machining applications requiring a 1.00 mm straight-cylindrical shank and 0.31 mm cutting diameter.

Installation Notes

Micro drill bits of this diameter should be installed by qualified machinists using precision collets rated for 1.00 mm shanks. Always ensure spindle runout is minimized before use, as even slight misalignment can cause breakage at this diameter. Power down and de-energize the machine spindle completely before changing tooling. Do not exceed manufacturer-recommended feed and speed parameters for the workpiece material.