Guhring 9005490083300 Jobber Drill Bit 21/64 in Hss

Product Description

The GUHRING 9005490083300 is a jobber length drill bit engineered for high-performance drilling in a range of workpiece materials. Built from high speed steel with a bright uncoated finish, this bit features a parabolic flute design that improves chip evacuation and reduces heat buildup during extended drilling operations. The 130-degree split point minimizes walking on entry and reduces thrust requirements. At 4-19/32 inches overall length with a 2-15/16-inch flute length, it conforms to DIN 338 standards. Designed for right-hand cut operation, it suits production and maintenance drilling environments where consistent hole quality and tool life are priorities.

This drill bit is rated for primary use in aluminum and non-ferrous materials, as well as plastics and low-alloy steels, per its K, N, and P workpiece material classifications. It is well suited to machine shop, fabrication, and field maintenance applications where a standard jobber length straight-shank bit is required. The Series 549 designation identifies it as a Guhring high-performance catalog offering. It fits standard drill chucks accepting a 21/64-inch straight cylindrical shank and is sold individually.

Key Features

• 21/64 inch (0.3281 inch) diameter with a tolerance of -0.022 to 0.000 mm for precise hole sizing
• Parabolic flute geometry promotes efficient chip evacuation, especially in aluminum and non-ferrous materials
• 130-degree point angle reduces entry thrust and minimizes workpiece deflection
• Web-thinned, tapered web configuration lowers cutting resistance and extends tool life
• DIN 338 standard construction ensures dimensional consistency and broad chuck compatibility
• Bright uncoated finish supports easy visual inspection and is suitable for general-purpose cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use jobber length drill bit for standard drill chucks accepting a 21/64-inch straight cylindrical shank, conforming to DIN 338 specifications.

Installation Notes

This bit is installed by machinists, tool and die professionals, and maintenance technicians using standard drill presses, CNC machining centers, or hand-held power drills with compatible chucks. Ensure the machine spindle and chuck are fully secured before operation and verify that the workpiece is clamped or fixtured to prevent movement during drilling. Use appropriate cutting fluid or coolant for the workpiece material to maximize bit life, particularly when drilling aluminum or steel. Inspect the cutting edges for wear before each use and replace the bit when point geometry is visibly degraded.