Guhring 9055200088000 Cobalt Stub Drill Bit 0.3465 in

Product Description

The GUHRING 9055200088000 is a cobalt stub-length (screw machine length) twist drill bit built to DIN 1897 standards. It measures 0.3465 inches (8.80 mm) in diameter with an overall length of 84.00 mm and a flute length of 40.00 mm. The 118-degree four-facet split point reduces walking and entry force, while the web-thinned, tapered web construction lowers thrust requirements. Two spiral flutes evacuate chips efficiently. This bit is suited for production drilling operations where rigidity and hole accuracy matter. Licensed tradespeople, machinists, and maintenance technicians are the primary users.

This drill bit is designed for drilling aluminum and similar non-ferrous or soft materials in stub-length applications where a shorter, stiffer tool is preferred over a jobber-length bit. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. A maximum drilling depth of 1.0550 inches (26.80 mm) and a 3xD flute-to-diameter ratio make it appropriate for through-holes and blind holes in production fixtures, machine shops, and maintenance environments. Right-hand cut geometry matches conventional drill press and CNC spindle rotation.

Key Features

• Cobalt tool material for improved hardness and heat resistance over standard HSS
• 118-degree four-facet split point reduces drill walk and lowers entry thrust
• Web-thinned tapered web reduces axial cutting force
• Stub-length (DIN 1897) body provides greater rigidity than jobber-length designs
• Straight-cylindrical shank fits standard chucks and collet holders
• Right-hand spiral flutes for conventional machine spindle direction

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit compatible with standard drill chucks and collet holders accepting an 8.80 mm straight-cylindrical shank. Primary workpiece material rating is aluminum per manufacturer specifications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the drill chuck or collet is fully secured and the workpiece is clamped before starting the spindle. Disengage power to the machine and allow the spindle to come to a full stop before changing or inspecting the bit. Do not exceed the maximum drilling depth of 1.0550 inches without retracting to clear chips.