Eagle Cutting Tool C300-020-D Cobalt Jobber 5/16 Inch

Product Description

The EAGLE CUTTING TOOL C300-020-D is a 5/16-inch cobalt jobber-length drill bit manufactured in the USA. Cobalt construction provides superior heat resistance and hardness compared to standard high-speed steel, making this bit well-suited for drilling through tough materials such as stainless steel, cast iron, hardened alloys, and other hard metals. The jobber-length geometry offers a balanced combination of reach and rigidity, which is the standard configuration used by trade professionals across mechanical, electrical, and plumbing work for general-purpose hole-making tasks.

This drill bit is intended for use in residential and commercial trade applications where hard or abrasive materials are encountered. It is commonly used by electricians drilling through metal studs or enclosures, plumbers boring through metal pipe supports or brackets, and HVAC technicians drilling into sheet metal or equipment housings. The 5/16-inch diameter is a frequently used size for bolt clearance holes, conduit anchors, and similar fastening applications.

Key Features

• Cobalt construction for enhanced heat and wear resistance in hard-metal drilling
• 5/16-inch diameter in standard jobber length for versatile reach and stability
• USA manufactured
• Suitable for stainless steel, cast iron, hardened alloys, and similar materials
• Compatible with standard drill chucks and drill presses used in trade work

Compatibility

Designed as a standard 5/16-inch jobber-length drill bit compatible with any drill press or handheld drill accepting a 5/16-inch or larger keyed or keyless chuck.

Installation Notes

Cobalt drill bits should be used with appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and maintain hole quality. Always secure the workpiece before drilling and wear appropriate eye protection. Use the lowest effective RPM for hard or thick materials to prevent overheating. This bit should be installed and operated by qualified trade professionals following applicable workplace safety standards.

Technical Specifications

• Drill Diameter: 5/16 inches
• Drill Type: Jobber Length
• Material: Cobalt
• Country of Origin: USA
• Weight: 1.2 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C300-020-D