Guhring 9006220069000 Cobalt Drill Bit Letter I

Product Description

The GUHRING 9006220069000 is a cobalt jobber length drill bit sized to letter I (0.2717 inches decimal), built for high-performance drilling in demanding shop and field environments. Manufactured to DIN 338 standards, it features a 130-degree split point for fast, accurate starts without a center punch. The parabolic flute geometry improves chip evacuation and reduces heat buildup during extended drilling cycles. With an overall length of 4-9/32 inches and a 2-23/32 inch flute length, this bit handles depths up to 2.309 inches. The bright, uncoated finish is standard for cobalt grade tooling and is suitable for use with cutting fluids. Licensed HVAC techs, machinists, pipefitters, and industrial maintenance trades rely on cobalt drills like this for materials that wear out standard HSS tooling.

The 9006220069000 is rated for primary use in aluminum and non-ferrous workpiece materials, as indicated by the K, N, and P material group codes. It is equally suited to light steel, cast iron, and plastics encountered in fabrication, panel work, conduit installation, and equipment repair. The straight-cylindrical shank fits standard 3-jaw drill chucks without adapters. The parabolic flute design with web thinning makes it especially effective in gummy or stringy materials where standard flute drills tend to pack and grab. Series 622 identifies this as part of a GUHRING high-performance cobalt line built to tighter tolerances than general-purpose HSS bits.

Key Features

• Cobalt construction for higher heat resistance compared to standard HSS tooling
• 130-degree drill point angle for fast engagement and reduced walking
• Parabolic flute geometry with web thinning for improved chip evacuation
• DIN 338 standard jobber length — 4-9/32 inches overall, 2-23/32 inches flute length
• Straight-cylindrical shank at 0.2717 inches diameter fits standard chucks directly
• Bright uncoated finish compatible with most cutting fluids and coolants

Compatibility

Designed as an OEM-style jobber length replacement or direct-fit drill for any application requiring a letter I (0.2717 inch) diameter bit with a straight-cylindrical shank and DIN 338 geometry. Primary workpiece material groups are K, N, and P, covering aluminum, non-ferrous metals, and select plastics.

Installation Notes

Installation is performed by machinists, maintenance technicians, or trade professionals using a standard drill press, hand drill, or CNC spindle with a 3-jaw or collet chuck. Secure the shank fully in the chuck before operation and verify runout with a dial indicator if tolerance is critical. Always apply appropriate cutting fluid for the workpiece material to extend tool life and maintain dimensional accuracy. Inspect the drill point for chipping or wear before each use — a damaged point will produce oversize holes and rough finishes.