Precision Twist Drill 5996110 Cobalt Drill Bit 47

Product Description

The PRECISION TWIST DRILL 5996110 is a cobalt aircraft extension drill bit designed for drilling in hard and tough materials where standard high-speed steel tooling falls short. Built to Series CO501-6 specifications, this bit carries a wire gauge size of 47, with a decimal diameter of 0.0785 inches and an overall length of 6 inches. The cobalt construction provides increased heat and wear resistance, making it well suited for production drilling in alloy steels, stainless steel, titanium, and other hard metals. A straw finish indicates a heat-treatment process consistent with cobalt tooling standards. Installation and use fall within the scope of machinists, aerospace maintenance technicians, and fabricators working in general-purpose and aircraft-rated applications.

This drill bit is intended for applications requiring reach beyond what a standard-length bit provides. The 1 inch flute length within the 6 inch overall length gives clearance for deeper setups or work in confined areas. The 135-degree split point is self-centering, eliminating the need for a center punch on most materials and reducing walking on entry. Right-hand cutting direction is standard for conventional drill press, CNC, and hand-tool use. Typical applications include aircraft structural work, sheet metal fabrication, and general metalworking where wire gauge sizing is specified. This bit conforms to NAS 907 Type J standards, which is relevant for aerospace maintenance and repair operations.

Key Features

• Cobalt tool material resists heat and wear when drilling hard alloys and stainless steel
• 135-degree split point is self-centering for accurate entry without center-punching
• Wire gauge size 47 with 0.0785 inch decimal diameter for precise hole sizing
• 6 inch overall length provides extended reach in deep or restricted setups
• Straw finish consistent with cobalt heat-treatment processing
• Conforms to NAS 907 Type J standard for aerospace-rated applications

Compatibility

Designed as a general-purpose cobalt aircraft extension drill bit for use in standard straight-shank drill chucks across drill presses, CNC machines, and pneumatic or electric hand drills accepting a 0.0785 inch straight-cylindrical shank.

Installation Notes

This drill bit is installed and used by machinists, aircraft maintenance technicians, and metalworkers using standard drill chuck equipment. Ensure the chuck is properly tightened and the shank is fully seated before operation. When drilling hard materials, use appropriate cutting fluid or coolant to extend tool life and reduce heat buildup. Inspect the cutting edges for wear before each use, as cobalt bits used on abrasive materials can dull without visible cracking.