Cleveland C15911 Cobalt Jobber Drill Bit No 34 0.1110 in

Product Description

The CLEVELAND C15911 is a cobalt jobber-length drill bit designed for high-performance drilling in tough materials including hardened steels, stainless steel, and high-temperature alloys. Built to M42 cobalt material grade, this bit holds a 135-degree split point that self-centers on contact and reduces walking without a center punch. The oxide coating provides added lubricity and corrosion resistance. With a straight-cylindrical shank measuring 0.1110 inches in diameter and an overall length of 2.625 inches, the C15911 is suited for use in standard drill chucks found on hand drills, drill presses, and CNC equipment. Machinists, maintenance technicians, and fabricators are the primary users of this bit.

This bit is sized to No. 34 wire gauge, with a decimal diameter of 0.1110 inches. It fits applications where small-diameter precision drilling is required, such as tapping pilot holes, sheet metal work, and precision component fabrication. The fast spiral flute promotes chip evacuation in deep-hole drilling scenarios. A shank length of 1.75 inches provides secure chuck grip, and the 0.875-inch flute length is appropriate for the typical depth-of-cut range associated with this wire size.

Key Features

• M42 cobalt construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces thrust force and eliminates walking on entry
• Web-thinned, tapered web configuration improves chip flow and cutting efficiency
• Fast spiral flute promotes aggressive chip evacuation
• Oxide finish coating adds lubricity and surface protection
• Diameter tolerance of -0.0005 to 0.0000 inches for consistent, accurate hole sizing
• NAS specification designation confirms heavy-duty grade compliance

Compatibility

Designed as an OEM-compatible jobber-length drill bit for use with standard straight-shank drill chucks across hand drills, drill presses, and light-duty CNC spindles accepting 0.1110-inch shank tooling.

Installation Notes

Installation of this drill bit requires a drill chuck rated for straight-cylindrical shanks at the 0.1110-inch diameter. Secure the shank fully into the chuck before operation and verify runout on sensitive applications. When drilling hard or stainless alloys, use appropriate cutting fluid to extend tool life and manage heat buildup. Follow shop safety protocols and applicable OSHA machine guarding standards when operating drilling equipment.