Guhring 9003010006100 Micro Drill Bit Wire 73 Cobalt

Product Description

The GUHRING 9003010006100 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. Sized at wire gauge 73 (0.0240 inches decimal), it features a 118-degree faceted point with web thinning on a tapered web configuration, which reduces entry thrust and improves centering on hard or abrasive workpiece materials. The spiral flute geometry promotes chip evacuation through the 4.20 mm flute length. The straight-cylindrical shank seats securely in standard chucks. Overall length is 0.984 inches. Licensed HVAC, machine tool, and metalworking trades install this bit in CNC micro-drilling, circuit board work, and precision fixture applications where tight positional tolerances are required.

This bit is rated for primary use in aluminum and non-ferrous metals, and is also suitable for titanium alloy as a secondary workpiece material. The DIN 1899 specification and 5xD flute-by-diameter ratio make it appropriate for shallow precision bores up to a maximum drilling depth of 0.1300 inches (3.29 mm). It is suited for production environments where consistent hole quality in small diameters is critical. No coolant-through capability; external coolant or cutting fluid application is recommended when drilling difficult alloys at depth.

Key Features

• Wire size 73, 0.0240 inches decimal diameter for micro-precision applications
• 118-degree faceted point with web thinning reduces thrust and improves hole entry accuracy
• Cobalt tool material provides elevated heat and wear resistance compared to standard high-speed steel
• Spiral flute with regular helix promotes chip evacuation in short, shallow bores
• Diameter tolerance held to +0.000 to -0.004 mm for consistent fit in tight-tolerance work
• Conforms to DIN 1899 specification, Series 301

Compatibility

Designed for use in aluminum, non-ferrous metals (material codes K, M, N, P), and titanium alloy (material code S) in applications requiring micro-diameter drilling per DIN 1899, Series 301.

Installation Notes

Installation of micro drill bits should be performed by qualified machinists or tooling technicians familiar with small-diameter tooling. Secure the straight-cylindrical shank fully in a precision collet or keyless chuck rated for the shank diameter before operation. Verify spindle runout is within acceptable limits, as excess runout accelerates tool breakage at this diameter. Apply external cutting fluid when drilling titanium alloy or other difficult materials to manage heat and extend tool life.