Cleveland C08777 5/16 in Taper Length Drill Bit Hss

Product Description

The CLEVELAND C08777 is a taper length, high-speed steel drill bit engineered for general-purpose drilling in metalworking and fabrication applications. Built to Series 2510 specifications, it features a 5/16-inch (0.3125-inch) diameter with a standard 118-degree point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip clearance at the start of the cut. The spiral flute design moves chips efficiently out of the hole. Overall length is 6-3/8 inches with a 4-inch flute length, making it suited for deeper reach than a jobber-length bit in the same diameter.

This drill bit is designed for right-hand cutting in alloy steel, carbon steel, and cast iron. The straight shank measures 5/16 inch in diameter and 2.375 inches in length, fitting standard three-jaw chucks on drill presses, lathes, and hand drills. It is built to ASME B94.11M and DIN 340 standards, making it a reliable choice for shops and maintenance technicians who require consistent, on-spec performance across general-purpose drilling tasks in ferrous materials.

Key Features

• 5/16-inch diameter with a diameter tolerance of +0.0000 to -0.0010 inches for precise hole sizing
• 118-degree standard point angle suitable for a wide range of ferrous materials
• Web-thinned, tapered web construction reduces entry thrust and improves centering
• 4-inch spiral flute length provides deeper reach compared to standard jobber-length bits
• Right-hand cut with coated high-speed steel for extended tool life
• Meets ASME B94.11M and DIN 340 standards

Compatibility

Designed for use in alloy steel, carbon steel, and cast iron applications. Fits any standard three-jaw chuck accepting a 5/16-inch straight shank. Suitable for drill presses, lathes, and portable hand drills in general-purpose shop and maintenance environments.

Installation Notes

Secure the straight shank fully in the chuck and verify runout before drilling. Power down the machine completely before changing bits. Use appropriate cutting fluid for steel drilling to extend bit life and maintain hole tolerance. Inspect the cutting edges and web condition before each use; a dull or chipped bit increases thrust load and reduces hole quality.