Cleveland C70044 Cobalt Jobber Drill Bit 7.67mm 135

Product Description

The CLEVELAND C70044 is a cobalt jobber-length drill bit designed for demanding drilling applications in metal fabrication, maintenance, and industrial trade work. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit delivers extended tool life and resistance to heat buildup at the cutting edge. It measures 7.67 mm (0.3020 inches) in diameter with a 135-degree split-point tip that reduces walking on entry and lowers thrust force. Overall length is 4.375 inches, with a flute length of 3.0625 inches. The straight-cylindrical shank seats securely in standard drill chucks. This is a heavy-duty grade bit suited for production and field use.

The C70044 is rated for drilling aluminum as the primary workpiece material and is appropriate for non-ferrous metals and similar machinable materials. The 135-degree split-point geometry makes it especially effective on flat or curved surfaces where bit walk must be minimized. The regular spiral flute with tapered web and web-thinned point reduces cutting resistance and improves chip evacuation. This bit is used by machinists, millwrights, HVAC technicians, plumbers, and electricians for sheet metal, structural components, and equipment fabrication. It conforms to NAS 907 Type J standards, making it a recognized specification part for aerospace-adjacent and industrial procurement.

Key Features

• M42 cobalt steel construction for heat resistance and extended tool life in heavy-duty drilling
• 135-degree split-point tip reduces bit walk and lowers feed pressure on entry
• Gold oxide coating provides lubricity and additional wear resistance
• Web-thinned, tapered web design improves chip flow and reduces cutting torque
• Right-hand cut with regular spiral flute for consistent chip evacuation
• Meets NAS 907 Type J specification for industrial and aerospace-adjacent applications

Compatibility

Designed for use in standard drill chucks accepting a 0.3020-inch straight-cylindrical shank. Sized within the 0.3000 to 0.3500 inch (7.00 to 8.00 mm) drill bit range. Compatible with benchtop drill presses, hand drills, and CNC drilling setups that accept jobber-length tooling of this shank diameter.

Installation Notes

This bit is installed by licensed machinists, maintenance technicians, and trade professionals using standard drill chucks or collet systems. Secure the shank fully in the chuck before operation and verify runout is within acceptable tolerance for the application. Coolant-through is not supported on this bit; use external cutting fluid or lubricant when drilling harder alloys to preserve edge life. Always wear appropriate eye protection and secure the workpiece before drilling.