Guhring 9005490081000 Jobber Drill Bit 8.1mm Hss

Product Description

The GUHRING 9005490081000 is a jobber-length twist drill bit engineered for high-performance drilling in a range of materials. Built from high speed steel with a bright uncoated finish, this bit measures 8.1 mm (0.3189 inches) in diameter with a 130-degree split-point angle and a parabolic flute design. Overall length is 117 mm (4-39/64 inches) with a flute length of 75 mm (2-61/64 inches). It is a right-hand cut tool with a straight-cylindrical shank, conforming to DIN 338 standards. This bit is suited for use on drill presses, CNC machining centers, and hand-held drilling equipment where precise, clean-entry holes are required.

This drill bit is rated for primary use in aluminum and other non-ferrous and light-alloy materials, consistent with its K, N, and P workpiece material classifications. The parabolic flute geometry promotes efficient chip evacuation during through-hole drilling, making it a practical choice for production environments and field fabrication. Its 5xD flute-to-diameter ratio supports drilling depths up to 2.474 inches (62.85 mm) per pass. Machinists, tool-and-die technicians, and mechanical contractors working with aluminum, plastics, and similar materials will find this a direct-fit selection for general-purpose jobber applications.

Key Features

• 8.1 mm (0.3189 inch) diameter with a straight-cylindrical shank for compatibility with standard drill chucks
• 130-degree point angle with web thinning for reduced entry force and improved centering
• Parabolic flute geometry for fast chip evacuation, particularly effective in soft and gummy materials
• High speed steel construction rated for high-performance grades per DIN 338
• Bright uncoated finish suitable for aluminum, plastics, and similar non-ferrous workpiece materials
• Right-hand cut, two-flute configuration with a tapered web design

Compatibility

Designed for use in standard drill chucks and collet systems accepting a 0.3189-inch straight-cylindrical shank. Primary workpiece materials are aluminum and non-ferrous alloys (K, N, P classifications per DIN 338). Conforms to DIN 338 jobber-length dimensional standards.

Installation Notes

Installation of this bit is performed by machinists or maintenance technicians using compatible drill presses, lathes, or CNC equipment. Ensure the spindle and workpiece are secured before engaging the drill. Verify chuck jaw condition and shank seating before operation to prevent runout. Consult machine manufacturer specifications for appropriate feed rates and spindle speeds for the intended workpiece material.