Cleveland C70102 Cobalt Jobber Drill Bit 5.5 Mm 135 Deg

Product Description

The CLEVELAND C70102 is a cobalt jobber length drill bit designed for demanding metal drilling applications in industrial and trade environments. Built from M42 high-cobalt steel and finished with a gold oxide coating, this bit delivers extended tool life when cutting through aluminum, steel, and other tough workpiece materials. The 135-degree split point reduces walking on entry and lowers thrust requirements, making it a practical choice for production drilling and field use. The web-thinned, tapered web construction improves chip evacuation and cutting efficiency. It measures 3.66 inches overall with a 2.244-inch flute length, and is manufactured to NAS 907 Type J standards for consistent dimensional tolerances.

This drill bit is suited for metalworking, fabrication, HVAC sheet metal work, and general mechanical trade applications where a reliable cobalt bit in the 5.5 mm range is needed. The straight-cylindrical shank seats securely in standard three-jaw drill chucks and collet-style holders found on drill presses, hand drills, and CNC equipment. It is a heavy-duty grade bit appropriate for production runs or repetitive drilling tasks where heat and wear resistance are priorities. Primary workpiece material is listed as aluminum, though M42 cobalt construction handles a broad range of metals encountered in field and shop settings.

Key Features

• M42 cobalt steel construction for heat resistance and extended cutting life
• 135-degree split point reduces drill walking and lowers required thrust
• Gold oxide coating provides lubricity and surface protection
• Web-thinned, tapered web improves chip flow and cutting efficiency
• Right-hand spiral flute with regular helix for consistent chip evacuation
• Manufactured to NAS 907 Type J standard with tight diameter tolerance of -0.0007 to 0.0000 inches

Compatibility

Designed as a direct-fit replacement or standard tooling selection for applications requiring a 5.5 mm cobalt jobber length drill bit with a straight-cylindrical shank compatible with standard drill chucks and collet holders.

Installation Notes

Installation of this bit is performed by licensed machinists, HVAC technicians, electricians, and mechanical trade professionals using standard drill equipment. Ensure the drill chuck or collet is fully tightened and the workpiece is secured before beginning drilling operations. Use appropriate cutting fluid or lubricant when drilling steel or hard alloys to maximize bit life and maintain dimensional accuracy. Inspect the cutting edges for wear or chipping before each use and replace if the split point or flute geometry is compromised.