Accupro A-6120300R 3mm Solid Carbide Micro Drill Bit

Product Description

The ACCUPRO A-6120300R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Built from solid carbide throughout, it delivers the rigidity and wear resistance required when working with hard metals, composites, and other demanding materials at small diameters. The 3 mm diameter and 120-degree point angle make it well suited to initiating clean, accurate holes without walking or deflection. At 38 mm overall length with a 14 mm flute length, it is compact enough for confined work envelopes while providing adequate chip clearance. Right-hand spiral flutes evacuate chips efficiently and support consistent feed rates in production or bench drilling operations.

This micro drill bit belongs to the Miniature series and is intended for precision machining environments where small-diameter hole quality is critical. Typical applications include light manufacturing, toolroom work, instrument assembly, PCB-adjacent metalwork, and other situations demanding fine hole geometry. The bright uncoated finish keeps the cutting edge geometry consistent and makes it easy to inspect for wear. It is sized for use in standard drill chucks and collet systems that accept 3 mm straight-cylindrical shanks.

Key Features

• Solid carbide construction for superior rigidity and wear resistance at small diameters
• 120-degree standard point angle for clean hole entry and reduced thrust force
• Right-hand spiral flute with regular spiral type for reliable chip evacuation
• Bright uncoated finish preserves sharp cutting geometry and simplifies wear inspection
• Straight-cylindrical shank compatible with standard 3 mm collets and chucks
• 38 mm overall length and 14 mm flute length suit compact work envelopes

Compatibility

Designed for use in drill presses, CNC machining centers, and hand-held precision drilling equipment accepting 3 mm straight-cylindrical shank tooling.

Installation Notes

This bit should be installed by a machinist or qualified technician familiar with small-diameter tooling. Secure the shank fully in a properly sized collet or chuck before operation and verify runout is within acceptable limits, as micro drill bits are sensitive to even minor misalignment. Always power down and lock out the machine before changing tooling. Avoid side loading or plunging at feed rates beyond the manufacturer-recommended range for the workpiece material, as solid carbide at this diameter is brittle and will snap under lateral stress.