Cleveland C16678 Cobalt Jobber Drill 15/64 in Tin

Product Description

The CLEVELAND C16678 is a cobalt jobber-length drill bit designed for demanding metal-cutting applications in professional trade and industrial environments. Built from M42 cobalt high-speed steel and coated with Titanium Nitride (TiN), this bit delivers extended tool life and reduced heat buildup when drilling ferrous metals. The 135-degree split point starts on contact without walking or center-punching, and the parabolic flute geometry clears chips aggressively. Overall length is 3-7/8 inches, with a flute length of 2-5/8 inches, and the straight shank diameter matches the bit diameter at 15/64 inches (0.2344 inches decimal). It meets ASME B94.11M and DIN 338 standards.

This bit is suited for drilling steel, cast iron, and similar ferrous workpiece materials in heavy-duty production or maintenance applications. The Series 2075T is a recognized heavy-duty jobber drill line intended for machinists, maintenance technicians, pipefitters, and fabricators who regularly work through hard or abrasive stock. The right-hand cutting direction is compatible with all standard drill chucks and magnetic drill presses. Web thinning reduces thrust requirements, making this bit practical for hand-held drilling where feed force is limited.

Key Features

• M42 cobalt HSS construction for high heat resistance in continuous metal cutting
• TiN coating extends cutting edge life and reduces friction against ferrous materials
• 135-degree split point eliminates walking and reduces center-punch requirements
• Parabolic flute profile promotes fast, efficient chip evacuation
• Web-thinned, tapered web reduces drilling thrust and minimizes bit deflection
• Meets ASME B94.11M and DIN 338 standards for jobber drill geometry

Compatibility

Designed for drilling steel and cast iron workpieces as stated by the manufacturer. Primary workpiece materials are steel and cast iron. Straight cylindrical shank fits standard 3-jaw drill chucks across common drill press, hand drill, and magnetic base drill platforms.

Installation Notes

This bit is installed and operated by machinists, maintenance mechanics, pipefitters, and fabricators using standard drill presses, magnetic drills, or hand-held power drills. Secure the straight shank firmly in a properly sized drill chuck before operation. Use appropriate cutting fluid or coolant on the workpiece to maximize bit life when drilling steel; this bit does not support through-coolant delivery. Inspect the cutting edges for wear before each use and replace the bit when point geometry degrades to avoid workpiece damage or bit breakage.