Cleveland C14821 Screw Machine Drill Bit 0.1181 in Cobalt

Product Description

The CLEVELAND C14821 is a screw machine length cobalt drill bit designed for high-production drilling in tough materials. Built to ASME B94.11M and DIN 1897 standards, this M42 cobalt bit measures 0.1181 inches in diameter with a 135-degree split point that reduces walking and improves centering on entry. The web-thinned, split point geometry lowers thrust requirements and extends tool life in demanding applications. At 1.811 inches overall length, the stub-length body increases rigidity and reduces deflection compared to jobber-length bits. Right-hand cut with a regular spiral and 2-flute configuration, it suits machinists, tool-and-die workers, and maintenance technicians working on tight-tolerance drilling tasks.

The C14821 is intended for drilling alloy steels, aluminum, and other metals where heat buildup and work hardening are concerns. The screw machine length format makes it a practical choice for drill press, turret lathe, and CNC applications where a short, stiff bit is preferred over a standard jobber. The M42 cobalt construction handles interrupted cuts and abrasive workpieces better than standard HSS. Its straight-cylindrical shank fits standard drill chucks without adapters, keeping setup fast on the shop floor or in the field.

Key Features

• M42 cobalt construction for heavy-duty drilling in alloy steel and aluminum
• 135-degree split point reduces thrust and eliminates the need for a center punch on most metals
• Web-thinned, parallel web design lowers cutting resistance and improves chip evacuation
• Screw machine (stub) length body maximizes rigidity and minimizes deflection
• Diameter tolerance held to +0.0000 to -0.0005 inches for precise hole sizing
• Meets ASME B94.11M and DIN 1897 specifications

Compatibility

Designed as a stub-length replacement or production drill bit for use in standard drill chucks accepting a 0.1181-inch straight-cylindrical shank, across drill press, turret lathe, and CNC machining applications in metals including alloy steel and aluminum.

Installation Notes

Installation and use of this drill bit should be performed by machinists or qualified tradespeople familiar with metalworking practices. Secure the shank fully in the chuck before operation and verify runout before high-tolerance work. Always wear appropriate eye protection and follow shop safety protocols when operating drilling equipment. For best tool life, use cutting fluid appropriate to the workpiece material and avoid excessive feed rates that can overheat the cutting edge.