Guhring 9006220059400 Cobalt Drill Bit Letter a 0.2339in

Product Description

The GUHRING 9006220059400 is a cobalt jobber length drill bit sized to Letter A (0.2339 inches decimal equivalent) with a 130-degree drill point angle. Built to DIN 338 standards, this bit features a parabolic flute geometry and web-thinned, tapered web construction that improves chip evacuation and reduces thrust during penetration. The bright, uncoated finish is retained as-ground, preserving the cobalt steel substrate for direct contact with the workpiece. It carries a straight-cylindrical shank, right-hand cut, and is rated as a high-performance grade tool appropriate for production drilling in metalworking environments. HVAC, plumbing, and electrical tradespeople who drill through sheet metal, structural steel, or aluminum will find this a reliable general-purpose bit.

This drill bit is suited for use in aluminum and non-ferrous metals as well as low-to-medium alloy steels, consistent with its primary workpiece material codes K, N, and P. The parabolic flute with a 5xD flute-to-diameter ratio supports deeper hole production at this diameter. With an overall length of 93 mm (approximately 3.66 inches) and a flute length of 57 mm (approximately 2.24 inches), it fits standard drill chucks and drill presses used in sheet metal fabrication, mechanical contracting, and light industrial applications. Maximum drilling depth reaches 48.09 mm (approximately 1.89 inches).

Key Features

• Letter A size — 0.2339 inch decimal equivalent, straight-cylindrical shank matching bit diameter
• Cobalt high-speed steel construction for increased heat and wear resistance over standard HSS
• 130-degree drill point angle for aggressive penetration and reduced walking on entry
• Parabolic flute with web-thinned, tapered web for improved chip flow and lower thrust force
• DIN 338 standard geometry — compatible with standard jobber-length drill chucks and holders
• Bright uncoated finish — suitable for regrinding and visual inspection of flute condition

Compatibility

Designed as a DIN 338 jobber length drill bit for use in standard 3-jaw drill chucks and drill press spindles accepting straight-cylindrical shanks at 0.2339 inch diameter. Primary workpiece material codes K, N, and P indicate suitability for aluminum, non-ferrous metals, and low-to-medium alloy steels.

Installation Notes

This drill bit is installed by machinists, pipefitters, electricians, and HVAC technicians using standard keyed or keyless drill chucks. Secure the straight shank fully into the chuck before drilling and verify concentricity before production runs. Always wear appropriate eye and face protection when drilling metal. Follow applicable OSHA machine guarding requirements and use cutting fluid appropriate to the workpiece material when drilling steel to extend tool life.