Guhring 9006580069000 Cobalt Drill Bit Letter I Tin

Product Description

The GUHRING 9006580069000 is a cobalt jobber-length drill bit sized to Letter I (0.2717 inches) and designed for high-performance drilling in demanding metalworking applications. Built to DIN 338 standards, the bit features a 130-degree split point, a parabolic flute geometry, and a titanium nitride (TiN) coating that extends tool life by reducing friction and heat buildup. The web-thinned, tapered web reduces entry resistance and improves chip evacuation. Overall length is 4-9/32 inches with a flute length of 2-23/32 inches. This is a straight-cylindrical shank bit with a right-hand cut, suited for use in standard drill chucks without modification.

This bit is rated for use in cast iron and steel workpieces, covering ISO material codes K and P. It fits into production drilling, maintenance, and tool-room environments where consistent hole tolerances and extended run life are priorities. The parabolic flute design allows for efficient chip removal in deeper holes, with a maximum drilling depth of 2.309 inches (58.65 mm). Machinists, tool-and-die shops, and industrial maintenance technicians regularly use Series 658 bits for repetitive drilling cycles in ferrous materials. This item ships individually (package quantity of 1); minimum order is 10 units.

Key Features

• Letter I size: 0.2717 inches diameter, conforming to DIN 338
• Cobalt construction with titanium nitride (TiN) coating for extended tool life in ferrous materials
• 130-degree point angle with web thinning for reduced entry force and improved centering
• Parabolic flute geometry (5xD ratio) promotes efficient chip evacuation in deeper cuts
• Straight-cylindrical shank fits standard drill chucks without adapters
• Right-hand cut, two-flute configuration suitable for cast iron and steel

Compatibility

Designed for drilling cast iron and steel workpieces, ISO material group codes K and P. Conforms to DIN 338 specification for jobber-length drill bits with straight-cylindrical shanks.

Installation Notes

Installation and use should be performed by machinists or qualified trade personnel familiar with metal-cutting tooling. Secure the shank fully in a calibrated drill chuck before operation and verify runout before high-tolerance work. Follow machine manufacturer guidelines for spindle speed and feed rate based on workpiece material and bit diameter. Inspect the cutting edges and coating for wear regularly; a degraded TiN coating or chipped edge will reduce hole quality and can damage the workpiece.