Cleveland C70159 Jobber Drill Bit 26 Cobalt 135 Deg

Product Description

The CLEVELAND C70159 is a jobber-length twist drill bit designed for precision hole-making in aluminum and other non-ferrous and light ferrous materials. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit resists heat buildup during high-speed drilling operations. The 135-degree split point reduces walking and allows the bit to self-center without a pilot hole. At 3 inches overall length with a 0.1470-inch diameter, it fits standard drill chucks and is suited for use with handheld drills, drill presses, and CNC equipment. HVAC, mechanical, and fabrication tradespeople commonly reach for this size when working with sheet metal brackets, equipment panels, and structural components.

The C70159 is sized to wire gauge number 26, equating to 0.1470 inch in decimal. The 135-degree split point and regular spiral flute geometry make this bit well matched to aluminum, but the M42 cobalt construction also holds up in stainless steel, cast iron, and other demanding materials. It is packaged as a single unit and meets NAS 907 Type J standards, making it appropriate for aerospace-adjacent maintenance and manufacturing environments where dimensional tolerances are critical.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• 135-degree split point for self-centering starts and reduced thrust force
• Gold oxide coating improves lubricity and heat resistance
• Web-thinned, tapered web design reduces cutting resistance
• Regular spiral flute with right-hand cut for standard drilling applications
• Meets NAS 907 Type J specification for controlled dimensional accuracy

Compatibility

Designed as a jobber-length straight-shank drill bit compatible with any drill chuck accepting a 0.1470-inch shank, including standard 3/8-inch and 1/2-inch keyed and keyless chucks on handheld and bench-mounted equipment.

Installation Notes

Installation and use should be performed by qualified machinists, maintenance technicians, or tradespeople familiar with rotating cutting tools. Secure the workpiece firmly before drilling to prevent movement. Use appropriate cutting fluid when drilling stainless steel or other work-hardening alloys to extend bit life and maintain tolerance. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.