Guhring 9005490079000 Jobber Drill Bit 7.9 Mm Hss

Product Description

The GUHRING 9005490079000 is a jobber length drill bit designed for precise hole-making in a range of materials. Built from high speed steel with a bright uncoated finish, this bit measures 7.9 mm (0.311 inches) in diameter and delivers a 130-degree standard point angle optimized for clean entry and reduced thrust. The parabolic flute geometry promotes efficient chip evacuation, reducing clogging during longer cuts. With an overall length of 117 mm (4-39/64 inches) and a flute length of 75 mm (2-61/64 inches), it conforms to DIN 338 standards. Rated as high performance grade, this bit suits shops and tradespeople who require consistent results on production runs or precision service work.

This drill bit is classified for primary use in aluminum as well as non-ferrous and ferrous workpiece materials corresponding to material codes K, N, and P. The straight-cylindrical shank fits standard drill chucks found on bench drills, hand drills, and CNC drilling equipment. Its parabolic flute design with a 5xD flute-to-diameter ratio makes it well suited to drilling deeper holes without frequent retract cycles. Machinists, maintenance technicians, and fabricators working in metalworking, HVAC fabrication, and industrial maintenance will find this a reliable daily-use bit.

Key Features

• 7.9 mm (0.311 inches) diameter with a diameter tolerance of -0.022 to 0.000 mm for consistent fit
• 130-degree standard point angle with web-thinned, tapered web for reduced thrust and cleaner starts
• Parabolic flute geometry with 5xD ratio for efficient chip removal in deeper holes
• High speed steel construction with bright uncoated finish suitable for aluminum and multi-material applications
• Straight-cylindrical shank compatible with standard drill chucks across hand and machine tools
• Meets DIN 338 specification for jobber length drill bits

Compatibility

Designed as an OEM-spec replacement or direct-use jobber length drill bit for applications requiring a 7.9 mm straight-cylindrical shank bit conforming to DIN 338, Series 549.

Installation Notes

This bit is installed by machinists, maintenance technicians, and fabricators using standard drill chucks on manual or CNC equipment. Ensure the drill chuck is fully tightened and the workpiece is securely clamped before drilling. For aluminum and non-ferrous materials, use appropriate cutting fluid or lubrication to extend bit life and improve hole quality. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.