Hertel C.E05.0767 Aircraft Extension Drill Bit Letter N

Product Description

The HERTEL C.E05.0767 is an aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work zone. Built from high-speed steel with an oxide finish, this bit measures 12 inches in overall length and carries a Letter N diameter of 0.3020 inches. The 135-degree split point is self-centering and reduces the need for a center punch before drilling. Web thinning on the tapered web lowers thrust requirements and improves chip evacuation. The spiral flute configuration runs right-hand with a 3.0625-inch flute length. Installation and use are typical for aerospace maintenance technicians, metalworking machinists, and industrial mechanics working in confined or extended-reach conditions.

This aircraft extension bit is suited for general-purpose drilling in metal, structural steel, aluminum, and similar materials where an extended reach is required. The straight cylindrical shank fits standard drill chucks without adapters. Applications include airframe maintenance, structural assembly, and general machine shop work where tight clearances or deep hole locations demand a longer bit. The two-flute design balances chip removal and rigidity across a range of feed rates and spindle speeds appropriate to high-speed steel tooling. Conforms to NAS 907 standards, making it appropriate for aerospace and defense maintenance environments.

Key Features

• Letter N diameter, 0.3020 inches, for precise sizing in standard letter-series hole charts
• 135-degree split point is self-centering and reduces walking on curved or flat surfaces
• 12-inch overall length provides extended reach into deep cavities and confined structures
• High-speed steel construction with oxide finish for corrosion resistance and reduced friction
• Web-thinned tapered web lowers drilling thrust and improves chip flow
• Meets NAS 907 standard for aerospace-grade drill bit dimensional and performance requirements

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with any standard drill chuck accepting a 0.3020-inch straight cylindrical shank. Suited for use with handheld pneumatic drills, electric drills, and drill presses common in aerospace maintenance and metalworking applications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with metal-cutting tools and applicable shop safety procedures. Secure the straight shank firmly in the chuck and verify concentricity before drilling to prevent bit deflection at extended length. Always wear appropriate eye protection and secure the workpiece before starting the spindle. Consult applicable aerospace maintenance manuals or shop work orders for hole-size tolerances and finish requirements before drilling structural components.