Guhring 9055250085000 Extra Length Drill Bit Solid Carbide

Product Description

The GUHRING 9055250085000 is a solid carbide extra length drill bit engineered for demanding precision drilling applications in metalworking environments. Built from submicron-grade solid carbide with a FIREX coating, it delivers extended tool life when cutting through cast iron, steel, aluminum, and titanium alloy. The 140-degree split point is web-thinned and self-centering, reducing entry thrust and improving hole-start accuracy. With a 12xD flute-to-diameter ratio and coolant-through capability, this bit maintains cutting efficiency at extended depths. It measures 8.50 mm (0.3346 inches) in diameter with an overall length of 162.00 mm and a maximum drilling depth of 107.25 mm (4.2220 inches). Machinists and tool-room technicians specify this drill for high-production setups where chip evacuation and thermal management are critical.

This drill bit is suited for CNC machining centers and manual machines requiring extended reach into deep-hole features. Primary workpiece materials include cast iron and steel (ISO material codes K and P). Secondary workpiece materials include aluminum, titanium alloy, and related alloys (ISO codes H, M, N, and S). The straight-cylindrical shank fits standard drill chucks and collet systems with a shank diameter of 0.3937 inches (10.00 mm nominal). A tapered web configuration and regular spiral geometry support consistent chip flow in through-hole and blind-hole drilling operations. This bit is manufactured to DIN 6537 standards and carries California Proposition 65 compliance documentation.

Key Features

• Submicron-grade solid carbide construction for high wear resistance in ferrous and non-ferrous materials
• FIREX coating reduces friction and extends tool life in steel and cast iron applications
• 140-degree standard point with web thinning for self-centering entry and reduced thrust
• Coolant-through design supports deep-hole drilling up to 107.25 mm (4.2220 inches)
• 12xD flute-by-diameter ratio with regular spiral and tapered web for efficient chip evacuation
• Manufactured to DIN 6537 standards; right-hand cutting direction

Compatibility

Designed for use in CNC machining centers and drill presses fitted with standard drill chucks or collet holders accepting a straight-cylindrical shank. Primary workpiece compatibility includes cast iron and steel; secondary compatibility includes aluminum and titanium alloy per ISO material codes H, M, N, and S.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with carbide tooling. Secure the straight-cylindrical shank firmly in a clean, properly sized collet or drill chuck to prevent runout. Engage coolant-through lines before beginning the cut to protect the carbide substrate from thermal shock. Inspect the cutting edges and coating condition before each use, as carbide tools are sensitive to impact and improper clamping torque.