Guhring 9005520140000 Stub Drill Bit 0.5512 in Hss

Product Description

The GUHRING 9005520140000 is a screw machine length (stub) drill bit designed for high-performance drilling in aluminum and other non-ferrous materials. Built from high speed steel with a bright, uncoated finish, this bit features a parabolic flute geometry and a web-thinned, parallel web configuration that promotes efficient chip evacuation and reduced thrust at the cutting edge. The 130-degree drill point angle suits shallow entry and exit in softer metals. With an overall length of 4.2126 inches and a cutting diameter of 14.00 mm (0.5512 inches), this bit is sized for production and maintenance drilling where a shorter, stiffer stub-length tool reduces deflection and improves hole accuracy. Licensed machinists, tool-and-die professionals, and CNC setup technicians are the primary installers.

This drill bit is suited for stub-length drilling applications in aluminum, soft alloys, and similar workpiece materials where chip evacuation is a concern. The parabolic flute design increases chip curl and helps move material out of the hole faster than standard helix flutes, making it a practical choice for deeper holes relative to diameter in soft metals. The Series 552 designation and DIN 1897 standard confirm its geometry is matched to established screw machine length specifications used in both manual and CNC drilling operations.

Key Features

• 14.00 mm (0.5512 inch) cutting diameter with a tolerance of +0.000 to -0.027 mm for consistent hole sizing
• 130-degree standard point angle optimized for aluminum and non-ferrous entry
• Parabolic flute geometry with web thinning improves chip flow and reduces cutting force
• Stub (screw machine) length body at 4.2126 inches overall reduces deflection in short-reach setups
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification
• Conforms to DIN 1897 specification for dimensional consistency across replacements

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit suitable for use in CNC machining centers, drill presses, and screw machines accepting a straight-cylindrical shank in the 0.5512 inch diameter range. Primary workpiece material is aluminum per manufacturer specification.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle locked before removing or seating the bit. A properly sized drill chuck or collet holder should be used to secure the straight-cylindrical shank without runout. Machinists should verify spindle speed and feed rate against the workpiece material before engaging the cut. Inspect the cutting edge and web for wear or chipping before each use to maintain hole tolerance.