Guhring 9005520098000 Stub Drill Bit 0.3858 in Hss

Product Description

The GUHRING 9005520098000 is a screw machine length (stub) drill bit designed for high-performance drilling in production and job-shop environments. 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 during entry. The 130-degree split point provides accurate self-starting behavior without center-punching on most materials. At 0.3858 inches (9.80 mm) diameter and 3.5040 inches overall length, it is sized for operators who need a shorter, stiffer tool platform for shallow-to-moderate depth holes. Licensed machinists, tool-and-die workers, and maintenance technicians are the primary installers of this bit.

This drill bit is suited for drilling aluminum and other non-ferrous or soft ferrous workpiece materials in CNC machining centers, drill presses, and hand-held power tools with straight-shank collet or drill chuck setups. The stub length body reduces deflection compared to jobber-length equivalents, making it a practical choice for high-speed production runs or tight-clearance fixture work. The 3xD flute-to-diameter ratio supports maximum drilling depths up to 1.1140 inches (28.30 mm) per pass without pecking in typical aluminum applications.

Key Features

• Parabolic flute geometry with web thinning for reduced cutting resistance and improved chip flow
• 130-degree standard point angle for clean entry and accurate hole positioning
• Stub/screw machine length body for increased rigidity and reduced deflection
• High speed steel construction rated for high-performance drill bit grade service
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification
• Manufactured to DIN 1897 specification for consistent dimensional tolerances

Compatibility

Designed as a DIN 1897 Series 552 stub drill bit for use in straight-shank drill chucks and collet systems accepting a 0.3858-inch (9.80 mm) shank diameter. Suitable for aluminum as the primary workpiece material per manufacturer specification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotary cutting tool safety. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Verify chuck or collet runout is within acceptable limits before drilling to preserve edge life and hole accuracy. Do not exceed the recommended maximum drilling depth of 1.1140 inches per pass without re-evaluating chip load and evacuation for the specific workpiece material.