Guhring 9006580099200 Cobalt Jobber Drill Bit 25/64 in

Product Description

The GUHRING 9006580099200 is a cobalt jobber-length drill bit designed for high-performance drilling in ferrous materials. Measuring 25/64 inches (0.3906 inches decimal) in diameter with a 5.25 inches overall length, this bit features a 130-degree split point and a titanium nitride (TiN) coating that extends tool life and reduces heat buildup during cutting. The parabolic flute geometry promotes efficient chip evacuation, making it well suited for production drilling and repetitive hole operations. It is installed by machinists, maintenance mechanics, and metalworking tradespeople working on ferrous components.

This drill bit is built for drilling cast iron and steel, including structural and mild steel stock. The right-hand cut, straight-cylindrical shank seats securely in standard drill chucks and CNC machine tool holders. With a flute-to-diameter ratio of 5xD and a maximum drilling depth of 2.84 inches (72.12 mm), it handles standard through-hole and moderate-depth blind-hole applications. The web-thinned, tapered web configuration reduces entry force and improves centering on the workpiece. Conforming to DIN 338, this bit meets an established dimensional and performance standard common in industrial and commercial shop environments.

Key Features

• Cobalt construction with TiN coating for extended tool life in ferrous materials
• 130-degree drill point angle with web-thinned tapered web for reduced thrust and accurate starting
• Parabolic flute profile for fast, efficient chip evacuation in steel and cast iron
• Right-hand cut, straight-cylindrical shank compatible with standard drill chucks and machine spindles
• Conforms to DIN 338 specification for consistent dimensional tolerances
• Diameter tolerance of -0.022 to 0.000 mm ensures close-tolerance hole sizing

Compatibility

Designed as an OEM-spec replacement or new-installation drill bit for use in standard drill chucks and CNC tool holders accepting a 25/64-inch straight-cylindrical shank, with primary workpiece materials listed as cast iron and steel per DIN material codes K and P.

Installation Notes

This bit is installed by machinists and metalworking tradespeople using drill presses, CNC machining centers, or hand-held power drills with a compatible chuck. Ensure the shank is fully seated and the chuck is tightened before operation. Use appropriate cutting fluid or coolant for steel applications to manage heat, even though this bit does not support through-coolant. Inspect the cutting edge before each use and replace the bit if chipping or excessive wear is observed.