Guhring 9055250080000 Extra Length Carbide Drill Bit

Product Description

The GUHRING 9055250080000 is a solid carbide extra length drill bit engineered for high-performance drilling in demanding trade and industrial applications. Built on Guhring Series 5525, it features an 8.00 mm (0.315 inches) diameter, a 140-degree drill point angle, and a FIREX coating designed to extend tool life under high-heat cutting conditions. The overall length is 146.00 mm (approximately 5.75 inches), with a flute length of 108.00 mm (approximately 4.25 inches) and a shank length of 36.00 mm (approximately 1.42 inches). Coolant-through construction supports through-spindle coolant delivery, reducing heat buildup and chip evacuation issues during deep-hole drilling. This bit is suited for CNC machining centers and production drilling environments where dimensional accuracy and tool longevity are critical.

The 9055250080000 is intended for drilling cast iron and steel as primary workpiece materials, with secondary suitability for aluminum and titanium alloys. The 12xD flute-to-diameter ratio and maximum drilling depth of 96.00 mm (approximately 3.78 inches) make it well-matched to deep-hole operations on machining centers and multi-axis equipment. Web thinning and a tapered web configuration reduce entry thrust force and improve self-centering on flat and curved surfaces. Right-hand cutting direction is standard. This bit is appropriate for professional machinists, tool-and-die shops, aerospace fabricators, and industrial maintenance operations.

Key Features

• Solid submicron carbide construction for hardness and wear resistance in ferrous and non-ferrous materials
• FIREX coating provides thermal barrier and reduces built-up edge in high-speed applications
• Coolant-through design enables through-spindle coolant delivery for deep-hole drilling up to 96.00 mm
• 140-degree facet point with web thinning and tapered web for reduced thrust and self-centering entry
• 12xD flute-to-diameter ratio supports extended reach without sacrificing chip evacuation efficiency
• Straight-cylindrical shank at 0.315 inches diameter for standard collet and chuck compatibility

Compatibility

Designed for use in CNC machining centers and production drilling equipment accepting a 0.315-inch straight-cylindrical shank. Primary workpiece materials include cast iron and steel (ISO material codes K and P); secondary materials include aluminum, titanium alloy, and related alloys (ISO codes H, M, N, and S). Conforms to DIN 6537 standards.

Installation Notes

Installation should be performed by a qualified machinist familiar with carbide tooling and CNC setup procedures. Ensure the machine spindle and collet or chuck are clean and within tolerance before seating the shank. When using through-spindle coolant, verify coolant pressure and flow rate are appropriate for the material and feed rate before beginning the cut. Carbide tooling is brittle — avoid side loads, interrupted cuts at aggressive parameters, or re-chucking a tool that shows chipping without inspection.