Guhring 9055200080000 Cobalt Stub Drill Bit 0.315 in

Product Description

The GUHRING 9055200080000 is a cobalt stub-length drill bit designed for high-performance drilling in demanding shop and field applications. Built to DIN 1897 standards, it measures 8.00 mm (0.315 inches) in diameter with an overall length of 79.00 mm (3.11 inches) and a flute length of 37.00 mm (1.46 inches). The four facet split point at 118 degrees reduces thrust and improves self-centering on entry. Web thinning with a tapered web configuration further reduces cutting resistance, making this bit well suited for production drilling cycles where tool life and hole accuracy matter.

This stub-length drill bit is intended for use in screw machine and CNC drilling operations where a shorter, more rigid tool is required to minimize deflection. Its primary workpiece material rating is aluminum, though the cobalt construction handles a range of materials encountered in general metalworking. The straight-cylindrical shank fits standard drill chucks and collet holders. The 3xD flute-to-diameter ratio provides sufficient chip clearance for through-holes up to 25.00 mm (0.984 inches) deep. Machinists, tool-and-die professionals, and maintenance technicians in light manufacturing environments will find this bit a direct fit for precision hole work.

Key Features

• Cobalt tool material provides heat resistance and extended tool life in metalworking applications
• Four facet split point at 118 degrees for reduced entry thrust and improved self-centering
• Web-thinned tapered web configuration reduces cutting resistance during drilling
• Stub length (DIN 1897) for increased rigidity and reduced deflection in short-reach applications
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Maximum drilling depth of 25.00 mm (0.984 inches) with a 3xD flute-by-diameter ratio

Compatibility

Designed as an OEM-specification stub-length drill bit conforming to DIN 1897, suitable for use in standard drill chucks and collet holders accepting an 8.00 mm straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill press, CNC machining center, or hand-drill equipment. Ensure the shank is fully seated and clamped in the chuck or collet before operation. Verify spindle speed and feed rate are appropriate for the workpiece material before beginning the cut. Inspect the cutting edge for wear or chipping before each use and replace the bit when diameter tolerance can no longer be held.