Cleveland C70212 Jobber Drill Bit Wire 79 Cobalt

Product Description

The CLEVELAND C70212 is a jobber-length drill bit sized to wire gauge 79, equivalent to 0.0145 inches in decimal. It is manufactured from M42 cobalt high-speed steel and finished with a gold oxide coating that helps reduce friction and extend tool life. The bit features a 135-degree split point for fast penetration and reduced walking on entry. With a straight-cylindrical shank and two spiral flutes in a regular helix pattern, this bit is suited for use in standard drill chucks. It is a heavy-duty grade tool designed for production and maintenance drilling applications.

This bit is intended for drilling aluminum and similar non-ferrous and softer materials where a cobalt-grade tool provides increased heat resistance and edge retention over standard high-speed steel. The overall length is 0.75 inches (19.05 mm) with a flute length of 0.125 inches and a shank length of 0.625 inches. It is built to NAS 907 Type J standards, making it appropriate for precision work in aerospace maintenance, manufacturing, and general industrial settings. Machinists, tool-and-die technicians, and maintenance professionals are the primary users of this size range.

Key Features

• M42 cobalt steel construction for elevated heat and wear resistance
• Gold oxide coating reduces friction and helps extend cutting life
• 135-degree split point minimizes walking and reduces required feed pressure
• Web-thinned, tapered web design for improved chip evacuation
• Straight-cylindrical shank fits standard chucks without adapters
• Meets NAS 907 Type J specification for precision tolerance applications

Compatibility

Designed as a jobber-length replacement or production drill bit for wire gauge 79 applications conforming to NAS 907 Type J standards, with primary workpiece material listed as aluminum.

Installation Notes

This bit is installed in a standard drill chuck sized for a 0.0145-inch straight shank. Machinists and maintenance technicians should secure the shank fully in the chuck before operation and verify spindle speed is appropriate for the workpiece material and bit diameter. Coolant-through is not supported on this bit; apply cutting fluid externally when required by the workpiece material. Disconnect and lock out power to any drill press or machine tool before changing bits.