Guhring 9055250063500 Extra Length Carbide Drill Bit

Product Description

The GUHRING 9055250063500 is a solid carbide extra length drill bit designed for demanding hole-making applications in metalworking environments. Built from submicron-grade carbide and coated with FIREX finish, this bit delivers extended tool life and heat resistance in high-performance drilling operations. It measures 0.25 inches (1/4 inch, Letter E) in cutting diameter with a 140-degree drill point angle, spiral flute configuration, and through-coolant capability. The straight-cylindrical shank measures 0.3150 inches in diameter. Licensed HVAC, mechanical, and machining professionals working with cast iron, steel, aluminum, and titanium alloys will find this tool well-suited to production and maintenance drilling tasks.

The 9055250063500 belongs to Guhring Series 5525, an extra length drill platform engineered for deep-hole drilling in ferrous and non-ferrous metals. The 12xD flute-to-diameter ratio and overall length of approximately 5.75 inches (146 mm) support reach into deep bores that standard-length drills cannot access. Maximum drilling depth reaches 3.877 inches (98.48 mm). Primary workpiece materials include cast iron and steel (ISO material codes K and P). Secondary materials include aluminum and titanium alloys (ISO codes H, M, N, and S). The web-thinned, tapered web configuration and self-centering facet point reduce entry force and improve hole location accuracy.

Key Features

• Solid submicron carbide construction for extended tool life in hard and abrasive materials
• FIREX coating provides high-temperature resistance and reduced friction during cutting
• Through-coolant design supports chip evacuation and thermal management in deep-hole drilling
• 140-degree drill point with web thinning for self-centering entry and reduced thrust force
• 12xD flute length ratio allows drilling to a maximum depth of 3.877 inches (98.48 mm)
• Straight-cylindrical shank compatible with standard collet and drill chuck toolholding
• Right-hand cutting, two-flute spiral configuration for efficient chip removal

Compatibility

Designed as a Series 5525 extra length carbide drill bit conforming to DIN 6537 standards. Suitable for use in CNC machining centers, drill presses, and manual machines equipped with toolholding that accepts a 0.3150-inch straight-cylindrical shank. Rated for primary use in cast iron and steel, with secondary suitability in aluminum and titanium alloys per ISO workpiece material codes listed in the specifications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with carbide tooling and machine setup. Ensure the spindle and toolholder are clean and free of runout before seating the shank. Through-coolant supply should be confirmed and active before initiating deep-hole drilling cycles to prevent chip packing and thermal damage. Carbide tooling is brittle — avoid side-loading, interrupted cuts without appropriate feed adjustments, or improper clamping that induces shank movement.