Cleveland C14228 1/2 in Cobalt Screw Machine Drill Bit

Product Description

The CLEVELAND C14228 is a cobalt screw machine length drill bit engineered for demanding metalworking applications. Built to ASME B94.11M standards, it features a 135-degree split point that reduces walking and requires no center punch on most materials. The parabolic flute geometry promotes efficient chip evacuation, making it well suited for high-cycle drilling operations. At 3.75 inches overall length with a 2.25-inch flute length, this is a stub-length format designed for rigidity in short-reach setups. The M42 cobalt alloy construction provides elevated heat resistance compared to standard HSS, extending tool life in tough materials. This is a heavy-duty grade bit intended for professional shop and field use.

The C14228 is designed for drilling alloy steel, aluminum, and similar ferrous and non-ferrous metals where heat buildup and tool wear are primary concerns. Its screw machine length format reduces overhang and chatter, making it a preferred choice in drill presses, CNC machining centers, and manual lathes where a shorter bit profile is required. The straight cylindrical shank accepts standard drill chucks. It is appropriate for production shops, maintenance machinists, and trade professionals who require consistent hole tolerance in tough base materials.

Key Features

• M42 cobalt construction for superior heat and wear resistance compared to standard HSS
• 135-degree split point eliminates center-punching and reduces thrust force at entry
• Parabolic flute profile with web thinning for fast chip evacuation and reduced torque
• Screw machine (stub) length format increases rigidity and reduces deflection
• Diameter tolerance of +0.0000 to -0.0010 inches for consistent, close-tolerance holes
• Right-hand cut with straight cylindrical shank for compatibility with standard drill chucks

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for applications requiring a 1/2-inch cobalt stub-length drill in standard drill chucks and tool holders. Compatible workpiece materials include alloy steel and aluminum per manufacturer specification.

Installation Notes

This drill bit is installed and operated by machinists and trade professionals using drill presses, lathes, or CNC equipment. Ensure the spindle and chuck are fully powered down and at rest before inserting or removing the bit. Secure the straight shank firmly in the chuck to the full depth of the chuck jaws to prevent slippage under load. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole tolerance.