Guhring 9055200069000 Cobalt Stub Drill Bit 0.2717 in

Product Description

The GUHRING 9055200069000 is a cobalt screw machine length (stub) drill bit designed for demanding drilling applications where a shorter flute length provides increased rigidity and reduced deflection. Built to DIN 1897 standards, this bit features a 118-degree four-facet split point with web thinning for improved centering and reduced thrust force at entry. The straight-cylindrical shank and two-flute spiral design channel chips efficiently out of the hole. With a drill diameter of 0.2717 inches, it falls within the Letter I size designation and is suited for installation by machinists, maintenance technicians, and trade professionals working with aluminum and similar materials.

This stub-length drill bit is optimized for use in screw machine operations, CNC setups, and manual drilling where a compact overall length is required to minimize tool deflection. Its cobalt construction provides heat resistance for consistent performance in non-ferrous metals, with aluminum listed as the primary workpiece material. The tapered web configuration and web-thinned geometry support clean entry and exit in production drilling environments. A maximum drilling depth of 0.931 inches supports through-hole and blind-hole work within the stub-length operating range.

Key Features

• Cobalt tool material with coated finish for heat and wear resistance
• 118-degree four-facet split point with web thinning reduces thrust and improves self-centering
• DIN 1897 stub length for added rigidity and reduced deflection in close-tolerance work
• Two-flute regular spiral design promotes efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Right-hand cut with tapered web configuration for consistent performance

Compatibility

Designed as an OEM-style stub drill bit conforming to DIN 1897 standards, suitable for use in standard drill chucks and collet systems accepting a 6.90 mm straight-cylindrical shank. Listed primary workpiece material is aluminum.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools. Ensure the drill press, lathe, or CNC spindle is fully stopped and de-energized before changing or inspecting bits. Secure the shank firmly in a properly sized chuck or collet to the appropriate clamping torque specified by the tool holder manufacturer. Do not exceed the maximum drilling depth of 0.931 inches for this stub-length configuration.