Guhring 9005490070000 Jobber Drill Bit 7mm Hss

Product Description

The GUHRING 9005490070000 is a jobber-length twist drill bit designed for precision drilling in aluminum and other non-ferrous and ferrous materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this bit features a 130-degree split point angle and a parabolic flute geometry that improves chip evacuation and reduces heat buildup at the cutting edge. It measures 7 mm (0.2756 inches) in diameter with an overall length of 4-19/64 inches and a flute length of 2-23/32 inches. Manufactured to DIN 338 standards, it is rated as a high-performance grade bit suitable for production and maintenance drilling operations.

This drill bit is intended for use in machine shop, manufacturing, and maintenance environments where consistent hole quality in aluminum, plastics, and mild steels is required. The parabolic flute design with web thinning makes it especially well-suited for drilling aluminum (material codes K, N, P) where chip packing is a common concern. It is compatible with standard drill chucks and CNC machining centers accepting straight-cylindrical shanks. The Series 549 designation reflects a flute-to-diameter ratio of 5xD, providing a maximum drilling depth of approximately 2.303 inches (58.5 mm) per pass.

Key Features

• 130-degree standard point angle for clean entry in aluminum and general-purpose materials
• Parabolic flute geometry promotes efficient chip evacuation and reduces clogging
• Web-thinned tapered web reduces thrust force and improves drilling efficiency
• High-speed steel construction with bright uncoated finish, suitable for a wide range of workpiece materials
• Conforms to DIN 338 dimensional and tolerance standards
• Right-hand cut, straight-cylindrical shank fits standard drill chucks and CNC spindles

Compatibility

Designed as a DIN 338 jobber-length drill bit compatible with standard straight-shank drill chucks, CNC machining centers, and hand-held drilling equipment accepting a 0.2756-inch shank diameter. Primary workpiece materials include aluminum, non-ferrous metals, and general-purpose steels per material codes K, N, and P.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Secure the shank fully in the chuck and verify runout before drilling. Power down and de-energize all equipment before changing or inspecting drill bits. Do not exceed the recommended maximum drilling depth of 2.303 inches per pass without retracting to clear chips.