Guhring 9054980078000 Carbide Jobber Drill Bit 7.8mm

Product Description

The GUHRING 9054980078000 is a solid carbide jobber-length drill bit engineered for high-performance drilling in steel and other ferrous workpiece materials. It features a 7.8 mm diameter (0.3071 inches), a 140-degree cone relief point, and a nano-FIREX physical vapor deposition coating that extends tool life under demanding cut conditions. The straight-cylindrical shank measures 8.00 mm, making it compatible with standard precision chucks. With coolant-through capability and a two-flute right-hand spiral design, this bit is built for production and maintenance machining environments where tool longevity and hole quality are critical.

This drill bit is suited for machining steel (ISO material code P) in both production shop and maintenance-repair settings. The 5xD flute-to-diameter ratio and 41.30 mm maximum drilling depth make it appropriate for through-hole and blind-hole applications in medium to heavy workpiece stock. A 53.00 mm flute length and 91.00 mm overall length position it as a standard jobber-length tool for vertical machining centers, drill presses, and CNC lathes. It is sized within the 7.00 mm to 8.00 mm diameter range and carries a m7 diameter tolerance for close-tolerance hole production.

Key Features

• Solid carbide construction for rigidity and wear resistance in steel cutting
• nano-FIREX coating reduces friction and extends cutting edge life
• 140-degree cone relief point improves centering and reduces thrust force
• Coolant-through design supports high-speed, deep-hole drilling cycles
• Two-flute right-hand spiral flute for efficient chip evacuation
• Meets DIN 6535 and DIN 6537 L standards for consistent dimensional accuracy

Compatibility

Designed as an OEM-grade replacement or direct-fit tooling option for applications within the 7.00 mm to 8.00 mm drill bit size range, Series 5498, suitable for use with standard straight-shank drill chucks and collet systems accepting an 8.00 mm shank diameter.

Installation Notes

Installation and operation should be performed by a qualified machinist or toolroom technician. Before mounting, verify that the machine spindle and chuck are fully powered down and that the chuck bore is clean and free of debris. Secure the straight-cylindrical shank to the specified clamping depth per DIN 6535 guidelines to prevent pullout under load. Do not exceed the rated maximum drilling depth of 41.30 mm without retracting and clearing chips, particularly when coolant-through flow is not available.