Cleveland C70199 Cobalt Jobber Drill Bit Wire 66

Product Description

The CLEVELAND C70199 is a cobalt jobber-length drill bit designed for precision drilling in metalworking and light industrial applications. Built from M42 cobalt high-speed steel, it carries a gold oxide coating that improves heat resistance and extends tool life in demanding cuts. The 135-degree split point reduces walking on entry and lowers the thrust force needed to start a hole. At 1-3/8 inches overall length with a 1/2 inch flute length, this is a compact, wire-gauge-sized bit suited for tight-clearance drilling. Licensed machinists, maintenance technicians, and metal fabricators are the primary users. It meets NAS 907 Type J standards and is rated heavy duty.

The C70199 is sized at wire gauge number 66, equal to 0.0330 inch diameter, placing it in the 0.0000 to 0.0500 inch decimal range. Its right-hand spiral flute geometry and web-thinned, tapered web construction make it well suited for drilling aluminum and similar non-ferrous materials. The straight-cylindrical shank fits standard drill chucks without adapters. This bit ships individually and is ordered in multiples of 12 per the manufacturer minimum order requirement.

Key Features

• M42 cobalt steel construction for elevated heat and wear resistance
• Gold oxide coating reduces friction and extends cutting life
• 135-degree split point reduces entry walking and thrust requirements
• Web-thinned tapered web improves chip clearance and cutting efficiency
• Right-hand spiral flute with regular helix for consistent chip evacuation
• Meets NAS 907 Type J specification for dimensional and performance standards

Compatibility

Designed as an OEM-style wire-gauge jobber drill bit compatible with standard straight-shank drill chucks used in bench drills, hand drills, and CNC drilling setups where a number 66 wire gauge hole is required. Primary recommended workpiece material is aluminum, per manufacturer specification.

Installation Notes

This bit is installed by machinists and metal fabricators using standard three-jaw or keyless drill chucks. Always secure the shank fully in the chuck and verify concentricity before operation. Use appropriate cutting fluid for the workpiece material to preserve coating and edge life. Disconnect or de-energize the drill press or power tool before changing bits.