Precision Twist Drill 6001471 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001471 is a high speed steel aircraft extension drill bit designed for precision drilling in metalworking and aerospace maintenance applications. Built to Series 501-6 standards and conforming to NAS 907 Type B, this bit features a 135-degree split point that is self-centering and eliminates the need for a center punch on most materials. The straight cylindrical shank measures 0.1695 inches in diameter, matching the cutting diameter for consistent chuck engagement. An oxide finish provides baseline corrosion resistance and reduces friction during drilling. The two-flute spiral design with a web-thinned, tapered web configuration promotes efficient chip evacuation and reduces feed force.

This drill bit is suited for professionals performing aircraft structural work, sheet metal fabrication, and general-purpose precision drilling where extended reach is required. The 6-inch overall length gives technicians access to recessed or deep locations that standard-length bits cannot reach. The right-hand cutting direction and 4xD flute-to-diameter ratio make it a practical fit for hand drilling with a standard electric drill or drill press in production and maintenance environments. Aviation maintenance technicians, machinists, and sheet metal workers are the primary users.

Key Features

• 135-degree split point is self-centering for accurate hole starts without a center punch
• High speed steel construction handles a wide range of metals including aluminum, mild steel, and soft alloys
• Extended 6-inch overall length provides reach into confined or deep locations
• Web-thinned tapered web reduces cutting resistance and improves chip flow
• Oxide finish reduces surface friction and provides light corrosion resistance
• Conforms to NAS 907 Type B standard for aircraft-grade dimensional accuracy

Compatibility

Designed as an OEM-style aircraft extension drill bit conforming to NAS 907 Type B, suitable for use with standard 3-jaw chucks and drill presses that accept a 0.1695-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists, aviation maintenance technicians, and sheet metal workers using a drill press or hand drill with an appropriate chuck. Secure the workpiece firmly before drilling and confirm the chuck is tightened to the shank before operating. Always wear appropriate eye protection and follow applicable shop safety protocols when drilling metal. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.