Guhring 9006580088000 Cobalt Jobber Drill Bit 8.8 Mm

Product Description

The GUHRING 9006580088000 is a cobalt jobber-length drill bit with a titanium nitride (TiN) coating, designed for high-performance drilling in demanding production and maintenance environments. At 8.8 mm (0.3465 inch) in diameter with a 130-degree split point and parabolic flute geometry, this bit is built to handle cast iron and steel with reduced heat buildup and improved chip evacuation. The web-thinned, tapered-web construction lowers thrust requirements at entry. Machinists, tool-and-die technicians, and maintenance mechanics reach for this series when standard HSS bits underperform in tough ferrous materials.

This drill bit is suited for jobber-length drilling operations in ferrous metals, particularly cast iron and steel, across manufacturing, fabrication, and heavy maintenance settings. The straight-cylindrical shank accepts standard drill chucks on CNC machining centers, knee mills, drill presses, and handheld power tools. The parabolic flute profile supports efficient chip clearing in deep-hole applications up to a maximum drilling depth of 2.67 inches (67.80 mm). Series 658 is manufactured to DIN 338 standards, providing consistent dimensional accuracy within a diameter tolerance of -0.022 to 0.000 mm.

Key Features

• Cobalt substrate with TiN coating for extended tool life in cast iron and steel
• 130-degree drill point angle with web thinning for reduced entry thrust and clean starts
• Parabolic flute design promotes fast, reliable chip evacuation in deep cuts
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• Manufactured to DIN 338 specification for consistent sizing and runout control
• Tapered web construction adds rigidity and resists deflection during drilling

Compatibility

Designed for use in cast iron and steel workpieces (material codes K and P). Compatible with any standard drill chuck sized for a 0.3465-inch straight shank. Fits within the DIN 338 jobber-length drill series for direct replacement of same-diameter bits in that specification class.

Installation Notes

A licensed machinist or qualified maintenance technician should secure this bit firmly in a calibrated drill chuck before use and verify runout before starting a cut. Power down or de-energize the machine completely before inserting or removing the bit. Use appropriate cutting fluid or coolant for the workpiece material even though this bit does not feature through-coolant capability. Follow applicable shop-safety standards and machine-specific operating procedures when setting spindle speed and feed rate for the workpiece material.