Guhring 9003010007400 Micro Drill Bit Size 69 Cobalt

Product Description

The GUHRING 9003010007400 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. Sized at wire gauge 69 with a decimal diameter of 0.0292 inches, this bit features a 118-degree faceted point with web thinning for improved centering and reduced thrust force at entry. The overall length is 0.984 inches, and the straight-cylindrical shank measures 1.00 mm in diameter. Built to DIN 1899 specification, it is suited for machinists, tool and die shops, and precision fabrication environments where tight tolerances and consistent hole geometry are required.

This micro drill bit is primarily engineered for aluminum and non-ferrous materials, with secondary application in titanium alloys. The 5xD flute-to-diameter ratio and 3.69 mm maximum drilling depth make it well suited for shallow, small-diameter through-holes and blind holes in precision components. It is appropriate for use in CNC machining centers, drill presses, and manual precision drilling setups where repeatable results in fine-diameter work are critical. The bright, uncoated finish keeps the cobalt substrate exposed for direct heat dissipation during dry or lubricated drilling operations.

Key Features

• Wire gauge 69 diameter — 0.0292 inches decimal — for micro-precision hole work
• 118-degree faceted point with web thinning and tapered web configuration for accurate entry
• Cobalt construction provides elevated heat resistance versus standard high-speed steel
• Right-hand cut spiral flute promotes consistent chip evacuation in shallow holes
• Diameter tolerance of +0.000 to -0.004 mm supports tight-tolerance hole requirements
• Bright/uncoated finish — no coating buildup to affect final hole diameter

Compatibility

Designed for primary use in aluminum and non-ferrous workpiece materials, with rated secondary application in titanium alloys. Conforms to DIN 1899 specification for micro drill geometry. Suitable for use in standard straight-shank collet chucks and precision drill chucks accepting 1.00 mm shank diameter.

Installation Notes

This bit is installed by machinists and precision tooling technicians in machine shop environments. Secure the straight-cylindrical shank in a collet or drill chuck rated for 1.00 mm shanks before use. At micro diameters, spindle runout directly affects tool life and hole accuracy — verify runout on the spindle and chuck before drilling. Do not apply excessive feed force; cobalt micro drills are brittle at small diameters and will fracture if deflected or side-loaded.