Accupro A-6120035R Micro Drill Bit 0.35 Mm Solid Carbide

Product Description

The ACCUPRO A-6120035R is a solid carbide micro drill bit designed for precision drilling in small-diameter applications. It measures 0.35 mm (0.0138 inches) in diameter with a 25 mm overall length and a 1.60 mm flute length. The 120-degree point angle and spiral flute geometry support clean entry and efficient chip evacuation in tight bore work. The bright, uncoated finish is suited for use in materials where coating adhesion or thermal buildup is a concern. This bit is installed by machinists, tool-and-die technicians, and precision fabricators working in electronics, medical device, and instrumentation manufacturing.

This micro drill bit is used in applications requiring extremely small-diameter through-holes or blind holes. Typical scenarios include PCB drilling, instrument body machining, and miniature component fabrication. The straight-cylindrical shank with a 1.00 mm shank diameter seats in standard collet-style chucks on CNC machining centers, micro-drill presses, and precision benchtop drilling units. Right-hand cutting direction is standard for conventional spindle rotation setups.

Key Features

• 0.35 mm diameter (0.0138 inches decimal equivalent) for micro-scale bore work
• Solid carbide construction provides rigidity and wear resistance in hard or abrasive materials
• 120-degree point angle with standard point type for accurate positioning and reduced walking
• Spiral regular flute promotes consistent chip removal in short flute-length micro drilling
• Bright, uncoated finish — no coating delamination risk in sensitive material applications
• 1.00 mm straight-cylindrical shank fits standard micro-collet toolholders

Compatibility

Designed as an OEM-style replacement or direct-use micro drill bit for precision drilling setups using collet chucks or drill chucks accepting a 1.00 mm straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or precision tooling technicians. Ensure the spindle is fully stopped and the machine is powered down before seating or removing the bit from the collet. Use a properly sized collet or chuck to avoid runout, which is critical at sub-millimeter diameters. Micro carbide bits are brittle — avoid lateral loading, side pressure, or hand-tightening methods that introduce angular misalignment.