Guhring 9006600003700 Micro Drill Bit Wire 79 Cobalt

Product Description

The GUHRING 9006600003700 is a micro drill bit engineered for precision drilling in tight-tolerance applications. It carries a wire gauge size of 79, equivalent to 0.0145 inches in decimal diameter, and is manufactured from cobalt high-speed steel with a titanium nitride (TiN) coating for extended tool life and reduced friction. The 118-degree faceted point with web thinning and a tapered web configuration promotes accurate starting and minimizes thrust load. Overall length is 0.984 inches. The spiral flute design supports chip evacuation in shallow-hole drilling, and the straight-cylindrical shank seats securely in standard collet chucks and drill presses used for micro-drilling work.

This bit is rated primarily for aluminum and non-ferrous materials, with secondary suitability for titanium alloys. It is intended for production and precision drilling operations where small-diameter, tight-tolerance holes are required. The 5xD flute-to-diameter ratio and a maximum drilling depth of 0.073 inches make it well suited for PCB work, instrument components, and other fine-detail machining. The bit conforms to DIN 1899 specification. It is sold individually but carries a minimum order quantity of 10 units, making it appropriate for shop stocking or production runs.

Key Features

• Wire size 79 with 0.0145-inch decimal diameter for micro-precision drilling
• Cobalt construction with TiN coating for heat resistance and extended wear life
• 118-degree faceted point with web thinning reduces entry thrust and improves centering
• Right-hand cut spiral flute promotes chip evacuation in shallow holes
• Straight-cylindrical shank with 1.00 mm shank diameter fits standard micro collets
• Diameter tolerance held to +0.000 to -0.004 mm for tight-tolerance applications
• Conforms to DIN 1899 specification, Series 660

Compatibility

Designed for use in standard straight-shank micro collet chucks and precision drill presses accepting a 1.00 mm shank; primary workpiece materials are aluminum and non-ferrous metals, with secondary suitability for titanium alloys per material codes K, M, N, P, and S.

Installation Notes

This bit is installed and operated by machinists and precision drilling technicians. Before mounting, verify the collet or chuck is clean and free of debris to prevent runout that can snap small-diameter bits. Use appropriate spindle speeds for the workpiece material and bit diameter, as cobalt micro drills are sensitive to excessive feed rates. Never apply side load or use this bit for slot milling.