Guhring 9003010008900 Micro Drill Bit No. 65 Cobalt

Product Description

The GUHRING 9003010008900 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. Built to DIN 1899 specifications, this Series 301 bit carries a wire gauge size of No. 65, corresponding to a decimal diameter of 0.0350 inches. The 118-degree faceted point with web thinning and a tapered web configuration provides clean entry and reduces thrust load at the cutting edge. The bright, uncoated finish suits applications where coating buildup or heat transfer is a concern. Overall length is 0.984 inches. Licensed HVAC, metalworking, and mechanical trades install this type of bit in precision drilling operations on ferrous and non-ferrous materials.

This micro drill bit is suited for drilling aluminum, titanium alloy, and similar materials in tight-tolerance operations. The straight-cylindrical shank accepts standard collet chucks and drill press fixtures commonly found in production and field-service environments. Maximum drilling depth is 0.184 inches (4.67 mm), and the spiral flute geometry promotes chip evacuation in shallow-bore micro-drilling operations. The 5xD flute-to-diameter ratio supports consistent chip clearance across the full drilling depth. This bit is appropriate for precision component work in aerospace, HVAC fabrication, and general mechanical assembly where small-diameter hole accuracy is required.

Key Features

• No. 65 wire size, 0.0350 inch decimal diameter for tight-tolerance micro drilling
• Cobalt tool material provides hardness and heat resistance for aluminum and titanium alloy workpieces
• 118-degree faceted point with web thinning reduces entry thrust and improves point stability
• Tapered web configuration and spiral flute promote chip evacuation in shallow bores
• Bright, uncoated finish compatible with a wide range of cutting fluids and workpiece materials
• DIN 1899 Series 301 specification ensures dimensional consistency across the production run
• Diameter tolerance of +0.000 to -0.004 mm supports close-fit hole requirements

Compatibility

Designed as an OEM-style precision micro drill bit per DIN 1899 Series 301, compatible with standard straight-cylindrical shank collet chucks and drill fixtures accepting a 1.50 mm shank diameter. Primary workpiece materials are aluminum and titanium alloy.

Installation Notes

Installation and use of this micro drill bit should be performed by qualified machinists or trade professionals familiar with small-diameter tooling. Secure the straight-cylindrical shank firmly in a calibrated collet or drill chuck before operation to prevent runout that can snap micro-diameter bits. Use appropriate cutting fluid for the workpiece material to manage heat and extend tool life. Do not exceed the rated maximum drilling depth of 0.184 inches without retracting to clear chips.