Guhring 9003010001400 Micro Drill Bit 0.0055 in Cobalt

Product Description

The GUHRING 9003010001400 is a cobalt micro drill bit designed for precision drilling in demanding industrial and machining applications. Built to DIN 1899 specification, this bit features a 118-degree faceted point angle with web thinning for accurate center engagement and reduced thrust force at entry. The overall length is 0.984 inches, the drill diameter is 0.0055 inches, and the shank diameter is approximately 0.039 inches (1.00 mm). The bright, uncoated cobalt construction delivers heat resistance and edge retention in abrasive or high-strength materials. This bit is part of the Guhring Series 301 micro drill line and is typically installed by machinists, toolmakers, and precision metalworking professionals.

This micro drill bit is intended for use in precision machining environments where very small bore diameters are required. Its primary workpiece material rating is aluminum, with secondary suitability for titanium alloys. The right-hand spiral flute geometry promotes chip evacuation in shallow, fine-diameter holes. A maximum drilling depth of 0.023 inches makes this bit appropriate for circuit board manufacturing, watch and instrument component work, medical device fabrication, and other applications requiring tight tolerances in miniature features.

Key Features

• 0.0055-inch drill diameter with a diameter tolerance of +0.000 to -0.004 mm for tight hole accuracy
• 118-degree faceted point with web thinning reduces walking and lowers entry thrust
• Cobalt tool material provides elevated heat resistance compared to standard high-speed steel
• Bright, uncoated finish compatible with cutting fluids and suitable for non-ferrous and titanium alloy workpieces
• Straight-cylindrical shank fits standard collet chucks and drill chucks without modification
• DIN 1899 specification ensures dimensional consistency across the Series 301 product line

Compatibility

Designed as an OEM-specification micro drill bit per DIN 1899, compatible with precision machining spindles and collet chuck systems accepting a 1.00 mm straight-cylindrical shank. Rated for primary use in aluminum workpieces and secondary use in titanium alloys per material codes K, M, N, P, and S.

Installation Notes

This bit should be installed by a qualified machinist using a precision collet or drill chuck rated for the 1.00 mm shank diameter. Ensure the spindle and workpiece are fully secured before operation and confirm the chuck is clean and free of debris to prevent runout at this diameter. At 0.0055 inches, even minor misalignment or excessive feed rate will cause bit breakage, so machine tool settings should be verified against the manufacturer's recommended speeds and feeds for the workpiece material. Power down and de-energize the machine tool completely before changing bits.