Guhring 9005490125000 Jobber Drill Bit 12.5 Mm Hss

Product Description

The GUHRING 9005490125000 is a jobber-length twist drill bit built to DIN 338 standards from high-speed steel (HSS) with a bright, uncoated finish. It measures 12.5 mm (0.4921 inches) in diameter and carries an overall length of 151 mm (5-15/16 inches). The parabolic flute geometry improves chip evacuation and reduces heat buildup during drilling, making it well suited for production environments and precision work. The 130-degree split point with web thinning reduces entry force and helps the bit self-center without a pilot hole. This is a high-performance grade bit installed by machinists, tool-and-die workers, and maintenance technicians.

This drill bit is designed primarily for cutting aluminum and non-ferrous materials, as indicated by the K, N, and P workpiece material codes, though its high-performance HSS construction handles a range of general-purpose drilling tasks. The straight-cylindrical shank seats directly into standard drill chucks without an adapter. Its parabolic flute with a 5xD flute-to-diameter ratio supports a maximum drilling depth of approximately 82.25 mm (3.2380 inches), making it appropriate for through-hole and moderate blind-hole work in fabrication shops, maintenance facilities, and light manufacturing applications.

Key Features

• 12.5 mm (0.4921 inch) diameter with a diameter tolerance of -0.027 to 0.000 mm for tight fitment
• 130-degree drill point angle with web thinning for reduced entry force and improved self-centering
• Parabolic flute design enhances chip removal and reduces heat in the cut zone
• Two-flute, straight-cylindrical shank fits standard chucks without adapters
• Bright uncoated finish maintains base HSS hardness without coating complications on re-sharpening
• Meets DIN 338 specification for jobber-length drill geometry

Compatibility

Designed as a DIN 338 jobber-length replacement drill bit suitable for standard drill chucks accepting a 0.4921-inch straight-cylindrical shank. Primary workpiece materials are aluminum and non-ferrous metals (material codes K, N, P).

Installation Notes

This bit is installed by machinists and maintenance technicians using a standard keyed or keyless drill chuck on a drill press, CNC machining center, or handheld power drill. Secure the shank fully in the chuck before operation and confirm the spindle is at a complete stop before changing bits. Use appropriate cutting fluid or coolant for the workpiece material to extend bit life, noting this bit does not support through-coolant. Inspect the cutting edges for wear or chipping before each use and replace when the bit no longer cuts cleanly to avoid workpiece damage.