Precision Twist Drill 5995822 Cobalt Drill Bit 11/64 in

Product Description

The PRECISION TWIST DRILL 5995822 is a cobalt aircraft extension drill bit designed for demanding metal-drilling applications where standard-length bits fall short. Built to Series CO500-6 specifications, it features a 135-degree split point that self-centers on contact, eliminating the need for a center punch on most materials. The straw finish indicates heat treatment consistent with cobalt high-speed steel construction. At 11/64 inch (0.1719 inch) in diameter and 6 inches in overall length, this bit delivers extended reach in confined or deep-hole drilling scenarios. It is installed and used by machinists, aircraft maintenance technicians, pipefitters, and general metalworking tradespeople.

This bit is suited for drilling through steel, stainless steel, cast iron, and other hard metals in both production and maintenance settings. The extended 6-inch overall length makes it practical for reaching fastener locations in airframes, structural steel, and equipment frames where a jobber-length bit cannot reach. The 2-1/8-inch spiral flute length provides adequate chip clearance in these deeper drilling passes. General-purpose tool performance rating makes it appropriate for a wide range of shop and field applications.

Key Features

• 135-degree split point self-centers on curved or flat metal surfaces without a pilot punch
• Cobalt high-speed steel construction resists heat buildup in hard-metal drilling
• 6-inch overall length provides extended reach for aircraft, structural, and deep-hole work
• Web-thinned tapered web reduces thrust load and improves chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters
• Right-hand cutting direction; compatible with all standard drill drivers and drill presses
• Meets NAS 907 Type J standards

Compatibility

Designed as a general-purpose cobalt extension drill bit compatible with standard straight-shank drill chucks on handheld drills, drill presses, and magnetic base drills used in metalworking and aircraft maintenance applications.

Installation Notes

This bit is intended for use by machinists, aircraft maintenance technicians, and metalworking tradespeople. Secure the workpiece before drilling and use appropriate cutting fluid on hard metals to extend bit life and improve hole quality. Ensure the drill chuck is tightened firmly on the straight-cylindrical shank before operation. Follow applicable workplace safety standards and wear eye protection when drilling.