Guhring 9055200065300 Cobalt Stub Drill Bit 6.53mm

Product Description

The GUHRING 9055200065300 is a cobalt screw machine length (stub) drill bit designed for precision hole-making in production and maintenance environments. Built to DIN 1897 standards, this Series 5520 bit features a 6.53 mm diameter with a 118-degree four facet split point and a web-thinned, tapered web configuration for reduced thrust and cleaner entry. The two-flute spiral design with a straight-cylindrical shank suits standard drill chucks without modification. Weighing 0.029 pounds, it is sized for high-cycle drilling operations where rigidity and tool life matter. Licensed machinists, tool-and-die professionals, and maintenance technicians are the primary users of this bit.

This bit is rated for primary use in aluminum workpieces and is well suited for applications requiring short, rigid tooling in CNC machining centers, drill presses, and hand-held pneumatic or electric drilling equipment. The stub length body limits deflection in tight clearance situations and improves hole straightness at moderate depths. Maximum drilling depth is 21.21 mm (0.835 inches), making it appropriate for through-holes and blind holes in thin to medium stock. The right-hand cutting direction is standard for conventional drill spindle rotation.

Key Features

• Cobalt tool material provides heat and wear resistance in ferrous and non-ferrous materials
• 118-degree four facet split point with web thinning reduces walking and lowers required thrust
• DIN 1897 stub length for increased rigidity and reduced deflection versus jobber-length bits
• Straight-cylindrical shank fits standard three-jaw chucks without adapters
• Regular spiral flute geometry promotes chip evacuation in aluminum and similar materials
• No coolant-through design simplifies setup in standard drilling applications

Compatibility

Designed as an OEM-style replacement or direct-use stub drill bit for applications requiring a Letter F (6.53 mm) diameter bit conforming to DIN 1897 Series 5520 specifications.

Installation Notes

Installation of this bit requires a compatible drill chuck or collet sized to accept a 6.53 mm straight-cylindrical shank. Ensure the drilling machine spindle is fully stopped and locked before inserting or removing the bit. Secure the shank fully within the chuck jaws to the recommended engagement depth to prevent pullout under load. Always follow applicable machine guarding and PPE requirements per shop safety standards.