Cleveland C71020 5/16 Inch Hss Jobber Length Drill Bit

Product Description

The CLEVELAND C71020 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel with an oxide coating, the bit offers basic heat and wear resistance for everyday drilling operations. It measures 4.5 inches overall with a 3.1875-inch flute length and a straight cylindrical shank sized at 5/16 inches. The 118-degree standard point angle is the industry standard for general-purpose work. A web-thinned, tapered-web construction reduces thrust required at entry. This bit is a single-unit item and is a common stock item for HVAC technicians, plumbers, electricians, and general tradespeople who drill sheet metal, conduit knockouts, pipe flanges, and structural members on the job.

The C71020 is suited for light to medium-duty production and maintenance drilling. Its 2-flute spiral configuration provides efficient chip evacuation in through-hole and blind-hole applications. The regular spiral type and 4xD flute-to-diameter ratio make it appropriate for a wide range of common trade drilling tasks, including mounting brackets, hanging equipment, and field fabrication work. It conforms to ASME B94.11M and DIN 338 standards.

Key Features

• High speed steel construction with oxide coating for basic heat and corrosion resistance
• 118-degree standard point angle for general-purpose drilling across multiple materials
• Web-thinned tapered web reduces entry thrust and improves chip flow
• 2-flute regular spiral design for efficient chip evacuation
• Straight cylindrical shank compatible with standard 3-jaw drill chucks
• Meets ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard 3-jaw keyed or keyless drill chuck accepting a 5/16-inch straight cylindrical shank, including hand drills, drill presses, and magnetic base drills.

Installation Notes

This bit is installed and used by electricians, HVAC technicians, plumbers, and general tradespeople. Always secure the workpiece before drilling and ensure the drill chuck is tightened properly before operation. Use appropriate cutting fluid when drilling hard metals to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if the point is chipped or the flutes are damaged.