Guhring 9055230059400 Cobalt Jobber Drill Bit Letter a

Product Description

The GUHRING 9055230059400 is a cobalt jobber-length drill bit sized to Letter A (0.2340 inches) with a 118-degree four-facet split point. Built to DIN 338 standards from M35 cobalt high-speed steel, it delivers strong heat resistance and edge retention when drilling through tough materials. The bright/uncoated finish keeps the surface as-ground, which suits shops that regrind tooling. With a regular spiral flute, right-hand cutting direction, and web-thinned tapered web, this drill reduces entry force and improves chip evacuation. It is used by machinists and maintenance technicians working in metalworking, fabrication, and general-purpose production environments.

This drill is suited for cutting aluminum and a range of ferrous and non-ferrous metals, as indicated by its K, M, N, and P workpiece material codes. The straight-cylindrical shank fits standard drill chucks on bench drill presses, hand drills, and CNC machining centers. A flute-to-diameter ratio of 5xD and a maximum drilling depth of 1.893 inches (48.09 mm) make it a practical choice for through-holes and moderate-depth blind holes in typical sheet metal and structural stock thicknesses found in HVAC fabrication, plumbing rough-in, and light manufacturing applications.

Key Features

• M35 cobalt HSS construction for elevated heat resistance and extended tool life in metal drilling
• 118-degree four-facet split point reduces walking and lowers thrust force on entry
• Web-thinned tapered web improves chip flow and reduces chisel-edge pressure
• DIN 338 standard jobber length with a 5xD flute-to-diameter ratio
• Bright/uncoated finish allows for easy regrinding and inspection of wear
• Two-flute regular spiral design compatible with standard drill chucks and machining centers

Compatibility

Designed as an OEM-style jobber drill compatible with any standard drill chuck accepting a straight-cylindrical shank of 5.94 mm diameter, including bench drill presses, hand drills, and CNC machining centers. Suitable for primary workpiece material codes K, M, N, and P as specified by the manufacturer.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard drill press or hand-drill equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify that the workpiece is clamped to prevent rotation. Use appropriate cutting fluid or lubricant for the workpiece material to maximize tool life. Follow applicable shop safety codes and wear proper eye protection during all drilling operations.