Precision Twist Drill 6001494 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001494 is a wire gauge size 28 aircraft extension drill bit designed for precision drilling in aerospace and general metalworking applications. Built from high speed steel with an oxide finish, it features a 135-degree split point with self-centering geometry and web-thinned construction that reduces walking and cutting force at entry. The straight cylindrical shank measures 0.1405 inches in diameter, matching the 0.1405-inch drill diameter. With a 1.75-inch flute length and 6-inch overall length, this bit provides extended reach into recessed or deep-hole locations where standard-length drill bits cannot access. Cutting direction is right hand with a spiral flute and tapered web configuration. Licensed machinists, aircraft maintenance technicians, and tool-and-die professionals are the primary installers.

This drill bit is suited for aircraft assembly, sheet metal fabrication, and general purpose precision drilling in ferrous and non-ferrous metals. The extended overall length of 6 inches allows access to tight or recessed areas common in airframe and structural assembly work. The 135-degree split point performs well in both hand-drill and drill-press setups, making it a versatile option for production and maintenance environments. The Series 501-6 designation places it within a recognized line of aircraft-type extension drills built to NAS 907 Type B standards.

Key Features

• Wire gauge size 28, 0.1405-inch diameter for precision hole sizing
• 135-degree split point with self-centering tip reduces pilot hole requirement
• Web-thinned, tapered web design lowers thrust and cutting resistance
• 6-inch overall length provides extended reach in deep or confined work areas
• High speed steel construction with oxide finish for general purpose metal cutting
• Complies with NAS 907 Type B standard for aircraft drill applications

Compatibility

Designed as a general purpose aircraft extension drill bit suitable for use in hand drills, drill presses, and CNC equipment accepting a 0.1405-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists, aircraft technicians, or qualified metalworkers using standard drilling equipment. Secure workpieces firmly before drilling to prevent walking, even with the self-centering split point. Use appropriate cutting fluid for the material being drilled to extend tool life. Follow applicable shop safety standards and wear eye protection during operation.