Guhring 9003010004800 Micro Drill Bit 0.0189 in Cobalt

Product Description

The GUHRING 9003010004800 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Measuring 0.0189 inches in diameter with an overall length of 0.984 inches and a flute length of 3.00 mm, this bit is built for tight-tolerance work where standard jobber-length tooling is impractical. The 118-degree faceted point geometry and web-thinned, tapered web configuration reduce thrust and improve centering at entry. The bright/uncoated finish and right-hand spiral flute suit high-speed applications in non-ferrous and ferrous materials. Machinists, toolmakers, and precision metalworkers install this bit in CNC machining centers, drill presses, and precision hand-held spindles.

This micro drill bit is rated for primary use in aluminum and non-ferrous metals, with secondary suitability for titanium alloys. Its 5xD flute-by-diameter ratio provides adequate chip clearance within the maximum drilling depth of 0.090 inches (2.28 mm). The straight-cylindrical shank with a 1.00 mm shank diameter seats securely in standard collet-style toolholders. Series 301 construction conforms to DIN 1899 specification, making it a direct fit for shops that source to German tooling standards. Coolant-through capability is not available on this model.

Key Features

• Cobalt tool material for heat resistance and hardness retention in demanding materials
• 118-degree faceted point with web thinning for reduced entry thrust and improved hole accuracy
• Tapered web configuration supports chip evacuation in shallow micro-drilling applications
• Bright/uncoated finish compatible with cutting fluids and standard dry drilling conditions
• Diameter tolerance of +0.000 to -0.004 mm ensures close-tolerance hole sizing
• DIN 1899 Series 301 specification for consistent dimensional conformance

Compatibility

Designed as an OEM-specification micro drill bit per DIN 1899 Series 301, suitable for use in collet-style toolholders and precision spindles accepting a 1.00 mm straight-cylindrical shank. Rated for aluminum, non-ferrous metals (material codes K, M, N, P), and titanium alloys (material code S).

Installation Notes

This tool is installed by machinists and toolroom technicians in collet chucks or precision drill chucks rated for 1.00 mm shank diameters. Ensure the spindle and workpiece are properly secured before operation to prevent bit deflection or breakage at this diameter. Use appropriate cutting fluid for the workpiece material; consult the machine manufacturer and tooling supplier for recommended speeds and feeds. Do not exceed the maximum drilling depth of 0.090 inches per pass without retracting to clear chips.