Cleveland C16579 Cobalt Drill Bit 7/16 in 135 Degree

Product Description

The CLEVELAND C16579 is a 7/16-inch cobalt jobber-length drill bit designed for heavy-duty metal drilling in professional trade and industrial applications. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit holds cutting-edge hardness at elevated temperatures better than standard HSS tooling. The 135-degree split point self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. A parabolic flute geometry promotes efficient chip evacuation during deep-hole drilling. This bit is suited for machinists, pipefitters, ironworkers, and maintenance mechanics who regularly cut through tough ferrous and non-ferrous metals.

The C16579 is intended for drilling cast iron, stainless steel, carbon steel, and non-ferrous metals in both shop and field environments. Its 5.5-inch overall length falls within standard jobber-length range, making it compatible with most drill chucks and magnetic drill setups. The straight cylindrical shank fits standard 3-jaw chucks without adapters. It meets ASME B94.11M and DIN 338 standards, confirming dimensional accuracy for production and maintenance drilling work where bit-to-bit consistency matters.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• 135-degree split point self-centers and reduces thrust force on entry
• Parabolic flute design improves chip flow and reduces heat buildup in deep holes
• Gold oxide finish provides surface lubricity and additional corrosion resistance
• Web-thinned tapered web reduces cutting resistance without sacrificing rigidity
• Compliant with ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed for use in cast iron, stainless steel, carbon steel, and non-ferrous metal workpieces. Fits any standard drill chuck or magnetic drill unit accepting a 7/16-inch straight cylindrical shank. Belongs to Cleveland Series 2075.

Installation Notes

Install in a properly rated drill press, hand drill, or magnetic drill with the chuck secured fully before operation. Always wear appropriate eye protection and secure the workpiece before drilling. Use appropriate cutting fluid when drilling stainless steel or hardened steel to extend bit life and manage heat. Replace the bit if the cutting edge shows visible chipping, burning, or a marked increase in required feed force.