Guhring 9055200050000 Cobalt Stub Drill Bit 0.1969 in

Product Description

The GUHRING 9055200050000 is a cobalt stub-length (screw machine length) drill bit designed for high-speed drilling in demanding shop and field applications. Built to DIN 1897 standards, this right-hand spiral flute bit features a 118-degree four-facet split point and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 5.00 mm (0.1969 inches) in diameter, matching the drill diameter for straightforward chuck mounting. At 62.00 mm (2.44 inches) overall length with a 26.00 mm (1.02 inch) flute length, the stub geometry increases rigidity and reduces deflection compared to jobber-length bits. Licensed machinists, toolmakers, and industrial maintenance technicians are the primary users of this bit.

This drill bit is suited for use in CNC machining centers, drill presses, and hand-held power tools where a short, stiff cutting tool is required. The primary workpiece material designation is aluminum, though cobalt construction provides heat resistance for broader application in general-purpose production environments. With a maximum drilling depth of 0.728 inches (18.50 mm) and a 3xD flute-to-diameter ratio, it is well matched to shallow-hole, high-cycle drilling operations. Package quantity is one bit per unit.

Key Features

• Cobalt tool material with coated finish for extended tool life and heat resistance
• 118-degree four-facet split point with web thinning reduces entry thrust and improves self-centering
• Stub (screw machine) length at 62.00 mm (2.44 inches) overall for maximum rigidity and reduced deflection
• Regular spiral flute with tapered web configuration promotes efficient chip removal
• Straight-cylindrical shank for direct chuck mounting without adapters
• Built to DIN 1897 specification with a diameter tolerance of +0.000 to -0.018 mm

Compatibility

Designed as an OEM-style replacement and production drill bit for Series 5520 stub-length applications conforming to DIN 1897, suitable for drill presses, CNC machining centers, and handheld power tools accepting a 5.00 mm straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Ensure the spindle or chuck is fully de-energized and at a complete stop before inserting or removing the bit. Secure the straight-cylindrical shank firmly in a properly sized drill chuck or collet to prevent slippage under load. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.