Hertel C.E03.0625 Aircraft Drill Bit Letter D Hss

Product Description

The HERTEL C.E03.0625 is an aircraft extension drill bit designed for precision drilling in tight-clearance and deep-reach applications. Built from high-speed steel with an oxide finish, this bit uses a 135-degree split point that is self-centering and reduces walking on entry, eliminating the need for a center punch in most setups. The spiral flute geometry is web-thinned with a tapered web configuration, which reduces cutting resistance and improves chip evacuation. With an overall length of 6 inches and a flute length of 2.75 inches, it gives technicians extended reach into confined areas. It is a right-hand cutting, general-purpose bit intended for installation by aircraft maintenance, industrial, and precision machining professionals.

This bit is suited for drilling in sheet metal, structural aircraft components, and general-purpose metalworking where standard-length bits cannot reach. The Letter D size corresponds to a decimal diameter of 0.2460 inches, making it appropriate for applications requiring close-tolerance hole sizing. The straight cylindrical shank seats securely in standard drill chucks without modification. Compliance with NAS 907 standards confirms suitability for aerospace-grade drilling operations in both production and MRO environments.

Key Features

• 135-degree split point is self-centering for accurate hole placement without center-punching
• Web-thinned, tapered web construction reduces thrust load and improves chip flow
• High-speed steel construction with oxide finish for heat and wear resistance
• 6-inch overall length provides extended reach in confined or layered assemblies
• NAS 907 compliant for aerospace drilling applications
• Right-hand spiral flute with 2-flute design for efficient chip evacuation

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard drill chucks accepting a 0.2460-inch straight cylindrical shank, suitable for use in handheld drills, drill presses, and right-angle drill motors used in aerospace and industrial metalworking.

Installation Notes

This bit is installed by aircraft maintenance technicians, machinists, and industrial drilling professionals. Secure the straight shank firmly in the chuck before operation and verify chuck key removal prior to starting the drill. Use appropriate cutting fluid for the base material to extend bit life and maintain hole tolerance. Follow applicable workplace safety standards and any relevant aerospace maintenance documentation when drilling structural components.