Guhring 9055240051100 Cobalt Stub Drill Bit 0.201 in

Product Description

The GUHRING 9055240051100 is a cobalt stub-length (screw machine length) drill bit designed for high-performance drilling in demanding shop and field applications. Built to DIN 1897 standards, this Series 5524 bit features a 0.201-inch (wire size 7) diameter with a 118-degree four-facet split point for accurate starts and reduced thrust. The M35 cobalt steel construction provides heat resistance and edge retention when cutting through abrasive or work-hardening materials. A web-thinned, tapered web design reduces cutting forces and improves chip evacuation. Licensed machinists, tool-and-die professionals, and industrial maintenance technicians are the primary installers and users of this bit.

This drill bit is suited for production and maintenance drilling in light metals, aluminum, and similar materials where a shorter flute length provides added rigidity and reduces deflection. The stub-length body limits overhang when drilling in confined spaces or on short-stroke drill presses and CNC machining centers. The straight-cylindrical shank is compatible with standard drill chucks and collet holders. Maximum drilling depth is 0.722 inches (18.34 mm), making it appropriate for through-hole and blind-hole work within that range.

Key Features

• M35 cobalt steel construction for heat and wear resistance in abrasive materials
• 118-degree four-facet split point with web thinning for self-centering starts and reduced thrust
• Stub-length body (overall length 62 mm) adds rigidity and reduces deflection
• Regular spiral flute geometry promotes consistent chip evacuation
• Bright/uncoated finish suitable for aluminum and non-ferrous primary workpiece materials
• Conforms to DIN 1897 standard; 3xD flute-to-diameter ratio

Compatibility

Designed as an OEM-style replacement and general-purpose stub drill for use in standard drill chucks and collet holders accepting a straight-cylindrical shank; no specific machine model compatibility was provided in the product data.

Installation Notes

This bit is installed and operated by machinists and maintenance technicians using drill presses, CNC machining centers, or hand-held power drills with a compatible chuck. Ensure the machine is fully de-energized and the chuck is properly tightened before beginning operations. Use appropriate cutting fluid or coolant for the workpiece material even though this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace the bit when diameter tolerance can no longer be maintained.