Guhring 9003010002700 Micro Drill Bit Wire 86 Cobalt

Product Description

The GUHRING 9003010002700 is a cobalt micro drill bit in the Series 301 line, designed for precision drilling in small-diameter applications. It carries a wire gauge size of 86 with a decimal diameter of 0.0106 inches and an overall length of 0.984 inches. The 118-degree faceted point and web-thinned, tapered web geometry reduce entry force and improve centering accuracy on hard or thin workpieces. A bright, uncoated finish keeps the surface consistent for inspection and regrinding. The straight-cylindrical shank with a 1.00 mm diameter seats cleanly in standard micro chuck collets. Licensed tool technicians and precision machinists are the primary installers of this bit in production and toolroom environments.

This drill bit is rated primarily for aluminum and non-ferrous materials under material code K, M, and N classifications, with secondary suitability for titanium alloys under code S. It fits drilling applications requiring strict diameter control, with a tolerance of +0.000 to -0.004 mm. The maximum drilling depth is 0.059 inches (1.50 mm), making it appropriate for shallow through-holes and spot applications in thin-section aluminum components, PCB substrates, and precision machined parts. The 5xD flute-to-diameter ratio and regular spiral flute type maintain chip clearance through the cut at this micro scale.

Key Features

• Wire size 86 with 0.0106-inch decimal diameter for micro-precision hole sizing
• 118-degree faceted point with web thinning reduces thrust force on entry
• Cobalt construction provides heat resistance and edge retention in abrasive and hard materials
• Bright, uncoated finish suitable for regrinding and close dimensional inspection
• Straight-cylindrical 1.00 mm shank fits standard micro collet chucks
• Meets DIN 1899 specification for consistent dimensional and geometric standards

Compatibility

Designed as a Series 301 DIN 1899 micro drill bit for use in precision drilling of aluminum, non-ferrous materials, and titanium alloys where a wire gauge 86 diameter is specified.

Installation Notes

Installation of micro drill bits at this diameter requires a precision collet or micro chuck rated for 1.00 mm shanks. Always confirm spindle runout is within acceptable limits before chucking, as runout at this scale accelerates bit deflection and breakage. Power down and lock out the machine spindle before changing tooling. Cutting speeds and feed rates should follow the machine tool manufacturer guidelines for cobalt tooling in the specific workpiece material.