Cleveland C70059 Cobalt Jobber Drill Bit 1.2 Mm

Product Description

The CLEVELAND C70059 is a cobalt jobber length drill bit designed for precision drilling in hard and abrasive materials. Built from M42 cobalt high-speed steel with an oxide/gold coating, it delivers extended tool life compared to standard HSS bits. The 135-degree split point reduces walking and requires less feed pressure at entry, making it well suited for drilling without a center punch. The straight-cylindrical shank measures 0.047 inches in diameter, and the overall length is 1.5 inches. This bit is installed and used by machinists, maintenance technicians, pipefitters, and sheet metal workers operating drill presses or hand drills in fabrication and field service settings.

This drill bit is sized at 1.2 mm (0.0472 inches) and fits within the 0 to 2.00 mm drill size range. The spiral flute with regular helix and web-thinned, tapered web configuration promotes efficient chip evacuation during through-hole and blind-hole drilling. It conforms to NAS 907 specification, classifying it as a heavy-duty jobber drill suitable for production drilling in stainless steel, high-nickel alloys, titanium, and other hard ferrous metals where standard HSS tooling degrades quickly.

Key Features

• M42 cobalt steel construction for heat resistance and edge retention in hard materials
• 135-degree split point reduces thrust and eliminates walking on entry
• Oxide/gold coating adds lubricity and helps resist heat buildup
• Web-thinned tapered web improves chip flow and reduces torque
• Conforms to NAS 907 heavy-duty jobber specification
• Right-hand cut, regular spiral flute for standard drill press and handheld use

Compatibility

Designed as a heavy-duty jobber length drill bit conforming to NAS 907 specification, compatible with any drill press chuck or hand drill accepting a 0.047-inch straight-cylindrical shank.

Installation Notes

This bit is intended for use by machinists and maintenance trades operating standard drill presses, magnetic drills, or hand drills. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck tightness. Use appropriate cutting fluid or coolant when drilling hard alloys to preserve edge life. Do not exceed the drill press or tool manufacturer recommended RPM range for this diameter.