Guhring 9055240021000 Cobalt Stub Drill Bit 2.10mm

Product Description

The GUHRING 9055240021000 is a cobalt stub-length (screw machine length) drill bit designed for precision drilling in demanding shop and field applications. Built from M35 cobalt high-speed steel with a bright/uncoated finish, it delivers heat resistance and edge retention when cutting through aluminum and similarly machinable materials. The 118-degree four-facet split point with web thinning reduces thrust and promotes accurate, self-centering starts without a center punch. At 2.10 mm in diameter and 38 mm overall length, this short-flute design provides rigidity in tight setups and drill press applications where deflection must be minimized.

This drill bit suits machinists, tool-and-die workers, and maintenance technicians working with small-diameter holes in production or repair environments. The stub-length format is ideal for use in CNC machining centers, drill presses, and hand-held power tools where shorter overhang reduces runout. Primary workpiece material is aluminum, though the cobalt construction handles other non-ferrous and light ferrous materials encountered in typical shop work. It conforms to DIN 1897 specification for stub drill geometry.

Key Features

• M35 cobalt construction for elevated heat resistance and extended tool life
• 118-degree four-facet split point with web thinning for reduced thrust and self-centering entry
• Stub/screw machine length (38 mm OAL) provides added rigidity and reduced deflection
• Right-hand cutting, regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank (2.10 mm) fits standard collets and drill chucks
• Meets DIN 1897 specification for consistent geometry and dimensional tolerance

Compatibility

Designed as an OEM-style replacement or direct substitute for stub-length cobalt drill bits conforming to DIN 1897 in the 2.10 mm diameter class. Series 5524 GUHRING tooling.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Secure the shank fully in the drill chuck or collet before operation and verify runout is within acceptable limits. Ensure the spindle and workpiece fixture are powered down and locked out before changing tooling. Do not exceed the recommended drilling depth of 8.85 mm per pass without retracting to clear chips.