Cleveland C08618 Taper Length Drill Bit No. 51 Hss

Product Description

The CLEVELAND C08618 is a taper length, high-speed steel drill bit designed for general-purpose drilling in metalworking applications. Built to the Series 2510 standard, it carries a 118-degree standard point angle with web thinning for improved penetration and reduced thrust. The straight shank measures 0.0670 inches in diameter, matching the wire gauge No. 51 designation. At 3.75 inches overall length with a 2-inch spiral flute, this bit provides extended reach compared to a jobber-length equivalent while maintaining rigidity. Licensed machinists, tool and die technicians, and industrial maintenance trades install this type of tooling in bench drill presses and CNC drilling setups.

This bit is suited for drilling alloy steel, carbon steel, and cast iron in both production and maintenance environments. The taper length body gives it added reach for drilling deeper features or working through thicker stock without requiring an extended-length bit. The right-hand spiral flute and web-thinned tip make it a practical choice for small-diameter precision hole work in ferrous materials. It ships individually and is ordered in multiples of 10.

Key Features

• Wire gauge No. 51 size — 0.0670 inch diameter with a diameter tolerance of +0.0000 to -0.0005 inches
• 118-degree standard point angle with web-thinned, tapered web configuration for reduced entry thrust
• High-speed steel construction with coating for improved wear resistance
• Taper length body — 2-inch flute length and 3.75 inches overall length for extended reach
• Right-hand cut, regular spiral flute, straight shank — compatible with standard drill chucks
• Rated for alloy steel, carbon steel, and cast iron; conforms to ASME B94.11M and DIN 340

Compatibility

Designed as a general-purpose taper length drill bit for use in standard straight-shank drill chucks; suitable for bench drill presses, hand drills, and CNC drilling equipment that accept a 0.0670-inch straight shank. Material applications include alloy steel, carbon steel, and cast iron as specified by the manufacturer.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the shank fully in the drill chuck and verify concentricity before operation. Always use appropriate cutting fluid or coolant for the workpiece material when drilling ferrous metals to extend tool life and maintain hole tolerance. Wear appropriate PPE including eye protection whenever operating drilling equipment.