Cleveland C70130 Cobalt Jobber Drill Bit 11.5 Mm

Product Description

The CLEVELAND C70130 is a cobalt jobber-length drill bit designed for heavy-duty metal drilling applications. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit delivers extended tool life in demanding production and maintenance environments. It features a 135-degree split point for reduced walking and easier starting without a center punch. The straight-cylindrical shank measures 0.4528 inches in diameter, and the overall length is 5.59 inches. Two spiral flutes with a regular helix and a web-thinned, tapered web configuration promote efficient chip evacuation. Licensed tradespeople and machinists working in fabrication, mechanical contracting, and maintenance use this bit for precise, clean-entry drilling.

The C70130 is well suited for drilling aluminum and similar non-ferrous and ferrous metals in both shop and field settings. With a flute length of 3.7010 inches and a shank length of 1.8897 inches, it fits standard drill chucks and magnetic base drills used in mechanical and structural applications. The Series 2213 designation indicates a heavy-duty grade consistent with NAS 907 Type J specification requirements, making it appropriate for aerospace-adjacent maintenance and precision fabrication work where dimensional tolerance control is critical.

Key Features

• M42 cobalt steel construction for heat resistance and extended edge life in hard materials
• 135-degree split point reduces thrust and eliminates walking on entry
• Gold oxide coating provides lubricity and corrosion resistance during cutting
• Web-thinned, tapered web configuration improves chip flow and reduces cutting resistance
• Right-hand cut with regular spiral flute for standard drilling operations
• Meets NAS 907 Type J specification for consistent dimensional accuracy

Compatibility

Designed as a heavy-duty jobber-length drill bit in the 0.4000 to 0.5000 inch diameter range, compatible with standard straight-shank drill chucks and portable or bench-mounted drilling equipment accepting a 0.4528-inch shank. Primary workpiece material is aluminum; suitable for other non-ferrous and ferrous metals consistent with M42 cobalt tooling capabilities.

Installation Notes

Installation of this drill bit is performed by machinists, millwrights, or qualified maintenance technicians. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation, ensuring concentricity to avoid runout. Always wear appropriate eye protection and secure the workpiece before drilling. Follow applicable shop safety protocols and manufacturer cutting-speed recommendations for the workpiece material being drilled.