Guhring 9003010007900 Micro Drill Bit 68 Wire Cobalt

Product Description

The GUHRING 9003010007900 is a cobalt micro drill bit designed for precision drilling in tight-tolerance applications. It carries a wire gauge size of 68, equal to a decimal diameter of 0.0313 inches (1/32 inch), with a 118-degree faceted point angle and a web-thinned, tapered web configuration that reduces thrust and improves centering at entry. The overall length is 0.984 inches with a straight-cylindrical shank diameter of 1.00 millimeters. Cobalt construction provides heat and wear resistance for drilling harder and more abrasive workpiece materials. This bit is part of GUHRING Series 301, manufactured to DIN 1899 specification. Installation and use require right-hand rotation only.

This micro drill bit is suited for precision metalworking operations where small-diameter hole accuracy is critical. Primary workpiece material is aluminum, with secondary suitability for titanium alloys. The 5xD flute-to-diameter ratio and 4.12-millimeter flute length accommodate shallow-depth drilling to a maximum of 0.162 inches. Typical applications include instrument manufacturing, aerospace component work, electronics assembly, and fine mechanical fabrication where standard jobber-length bits are too large for the feature being drilled.

Key Features

• Cobalt construction for improved heat resistance over standard high-speed steel
• 118-degree faceted point with web thinning for reduced entry thrust and accurate self-centering
• DIN 1899 specification, Series 301 for consistent dimensional standards
• Straight-cylindrical shank, 1.00 millimeter diameter, compatible with precision collet chucks and micro drill chucks
• Right-hand spiral flute for efficient chip evacuation in aluminum and titanium alloy
• Bright/uncoated finish suitable for applications where coating buildup at small diameters is a concern

Compatibility

Designed as an OEM-style precision micro drill bit for use in applications requiring wire gauge size 68 or 1/32-inch diameter holes, with primary suitability for aluminum and secondary suitability for titanium alloy workpieces per material codes K, M, N, P, and S.

Installation Notes

This bit should be installed by a machinist or qualified technician in a precision collet chuck or micro drill chuck rated for the 1.00-millimeter shank diameter. Ensure the spindle and workpiece are properly secured before operation and verify spindle speed is appropriate for the workpiece material and bit diameter to avoid breakage at this size class. Do not use in hammer or impact-mode drilling equipment. Inspect the bit for chipping or wear before each use, as micro-diameter cobalt bits are brittle under lateral load.