Guhring 9055250071400 Extra Length Drill Bit Solid Carbide

Product Description

The GUHRING 9055250071400 is a solid carbide extra length drill bit designed for high-performance drilling in demanding production and job-shop environments. Built to DIN 6537 standards, it carries a FIREX coating for extended tool life and heat resistance. The bit measures 0.2813 inches (8.00 mm) in diameter with an overall length of 146.00 mm, a flute length of 108.00 mm, and a maximum drilling depth of 93.00 mm. The 140-degree drill point angle and web-thinned, tapered web geometry promote accurate entry and reduced thrust. Coolant-through capability supports chip evacuation in deep-hole applications. Licensed HVAC techs, machinists, and production drillers working in ferrous and non-ferrous materials will find this a capable production tool.

This drill bit is suited for drilling cast iron and steel as its primary workpiece materials, with aluminum and titanium alloy listed as secondary applications. The 12xD flute-to-diameter ratio makes it appropriate for extended-reach operations where a standard-length bit cannot reach. The straight-cylindrical shank and 8.00 mm shank diameter allow it to seat in standard collet chucks and drill chucks without adapters. It is appropriate for CNC machining centers, drill presses, and manual milling setups where precision and depth are required.

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance
• FIREX coating for elevated temperature and abrasion resistance
• Coolant-through design to assist chip evacuation in deep-hole drilling
• 140-degree drill point angle with web-thinned, tapered web for self-centering entry
• 12xD flute-to-diameter ratio enabling a maximum drilling depth of 93.00 mm
• Conforms to DIN 6537 standard; right-hand cutting with regular spiral flute

Compatibility

Designed as an OEM-style replacement or direct-fit drill bit for applications requiring a 0.2813-inch diameter solid carbide extra length drill in Series 5525 per DIN 6537. Primary workpiece materials are cast iron and steel (ISO material codes K and P); secondary materials include aluminum and titanium alloy (ISO codes H, M, N, and S).

Installation Notes

Install in a properly sized collet chuck or drill chuck rated for the 8.00 mm shank diameter; confirm runout is within tolerance before use. Power down and lock out the machine spindle before changing tooling. Follow the machine tool manufacturer's recommended feed and speed parameters for carbide tooling in the target workpiece material. Handle carbide tools carefully to avoid chipping the cutting edge during storage and setup.