Guhring 9003010010000 Micro Drill Bit 0.0394 in Cobalt

Product Description

The GUHRING 9003010010000 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. It measures 0.0394 inches in diameter with an overall length of 0.984 inches and features a 118-degree faceted point angle. The cobalt construction provides hardness and heat resistance suited for demanding materials. The spiral flute geometry with a web-thinned, tapered web configuration promotes chip evacuation and reduces thrust during entry. This bit is designed for machinists, tool-and-die technicians, and precision fabricators working with tight-tolerance bore requirements in production or prototype environments.

This micro drill bit is intended for use on aluminum as its primary workpiece material, with titanium alloy as a secondary application. The straight-cylindrical shank fits standard drill chucks and collet holders commonly used in CNC machining centers, drill presses, and precision hand-held equipment. With a maximum drilling depth of 0.209 inches and a flute-to-diameter ratio of 5xD, it is suited for through-holes and shallow blind holes in thin stock, sheet metal, and precision components where hole location and diameter accuracy are critical.

Key Features

• Cobalt construction for elevated hardness and heat resistance in difficult-to-machine alloys
• 118-degree faceted point with web-thinned tapered web for reduced entry thrust and improved centering
• Bright/uncoated finish with right-hand spiral flute for efficient chip removal
• Straight-cylindrical shank compatible with standard chucks and collets
• Diameter tolerance of +0.000 to -0.004 mm for consistent, repeatable hole sizing
• Conforms to DIN 1899 specification

Compatibility

Designed as an OEM-specification micro drill bit per DIN 1899 Series 301, suitable for use in CNC machining centers, bench drill presses, and precision drilling fixtures accepting straight-cylindrical shank tooling with a 1.50 mm shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or tool technician. Ensure the machine spindle is fully stopped and locked out before loading or removing the bit. Secure the straight-cylindrical shank firmly in a properly sized collet or drill chuck to prevent runout. At this diameter, excessive feed rate or side loading will cause bit breakage — follow the tooling manufacturer feed-and-speed recommendations for the workpiece material.