Guhring 9006220062500 Cobalt Drill Bit Letter D

Product Description

The GUHRING 9006220062500 is a cobalt jobber length drill bit sized to letter D (0.2461 inches) with a 130-degree split point and a parabolic flute geometry. Built to DIN 338 standards, this bit is designed for high-performance drilling applications where standard HSS bits fall short. The bright, uncoated finish keeps heat transfer efficient and allows for easy wear inspection. A web-thinned, tapered web design reduces thrust force at the point and improves chip evacuation. Licensed HVAC technicians, machinists, plumbers, and electricians working with aluminum and non-ferrous metals rely on this geometry for clean entry and consistent hole sizing. It ships individually and is rated as a high-performance grade tool in the Series 622 lineup.

This drill bit is best suited for drilling aluminum, non-ferrous metals, and plastics in production or field service environments. The parabolic flute profile handles deep hole drilling efficiently, with a maximum drilling depth of 2.111 inches. The straight-cylindrical shank seats securely in standard keyed or keyless chucks. Trades working on sheet metal layout, conduit knockout pre-drilling, or mechanical attachment points will find the letter D sizing accurate and repeatable for tapping or close-tolerance fits.

Key Features

• Cobalt construction provides heat and wear resistance beyond standard HSS bits
• 130-degree point angle with web thinning reduces thrust and improves self-centering on entry
• Parabolic flute design with a 5xD flute-to-diameter ratio supports efficient chip evacuation in deep holes
• Bright uncoated finish allows direct visual wear inspection without coating interference
• Right-hand cut with straight-cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 specification for consistent dimensional tolerances

Compatibility

Designed as a DIN 338 jobber length drill bit compatible with standard straight-shank drill chucks used in handheld drills, drill presses, and CNC drilling equipment suitable for letter D sizing.

Installation Notes

This bit is installed by a qualified tradesperson using a keyed or keyless drill chuck rated for the shank diameter. Always secure the workpiece before drilling and ensure chuck jaws are fully tightened before operation. Use appropriate cutting fluid when drilling ferrous or hard materials to extend bit life. Inspect the cutting edges for wear or chipping before each use and replace when the point geometry is no longer intact.