Guhring 9005520055000 Screw Machine Drill Bit 5.50mm

Product Description

The GUHRING 9005520055000 is a stub-length, screw machine drill bit designed for high-performance drilling in production and machining environments. Built from high speed steel (HSS) with a bright, uncoated finish, this bit measures 5.50mm (0.2165 inches) in diameter with an overall length of 2.5984 inches. The 130-degree split point and web-thinned, parabolic flute geometry reduce thrust force and improve chip evacuation, making this bit well suited for tight-tolerance work in aluminum and similar non-ferrous materials. It meets DIN 1897 standards for stub-length drills. Machinists, tool and die shops, and production drilling operations are the primary users of this style of bit.

This drill bit is optimized for short-hole applications where rigidity and precision matter more than depth. The stub flute length of 1.1024 inches limits deflection, and the straight cylindrical shank seats directly into standard drill chucks and collets without adapters. The maximum drilling depth is 0.7780 inches, consistent with the 3xD flute-to-diameter ratio of the Series 552 design. It is a practical choice for CNC machining centers, drill presses, and hand-held pneumatic drills used in metal fabrication and production environments where consistent hole quality is required.

Key Features

• 5.50mm (0.2165 inches) diameter, DIN 1897 stub-length configuration for rigid, low-deflection drilling
• 130-degree drill point angle reduces entry force and improves self-centering on flat or curved surfaces
• Parabolic flute geometry with web thinning promotes fast, efficient chip evacuation
• High speed steel construction with bright, uncoated finish suitable for aluminum and non-ferrous materials
• Straight cylindrical shank fits standard drill chucks and collets with no adapter required
• Diameter tolerance held to +0.000 to -0.018mm for consistent, repeatable hole sizing

Compatibility

Designed as a DIN 1897-specification stub-length drill bit for use in standard drill chucks, collets, and toolholders accepting a straight cylindrical shank in the 5.50mm diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with drilling parameters for the target workpiece material. Secure the shank fully in the chuck or collet and verify runout before initiating a cut. Disengage all power and lock out the machine spindle before changing tooling. Do not exceed the rated maximum drilling depth of 0.7780 inches per plunge without retracting to clear chips.