Hertel C.E03.0653 Aircraft Extension Drill Bit Letter F

Product Description

The HERTEL C.E03.0653 is an aircraft extension drill bit designed for reaching into deep or restricted areas where a standard-length bit cannot access. Built from high-speed steel with an oxide finish, this bit carries a Letter F designation, which corresponds to a decimal diameter of 0.2570 inches. The 135-degree split point is self-centering and reduces walking on entry, making it well suited for precision work in metal fabrication, aerospace maintenance, and structural repair. The web-thinned, tapered web configuration lowers thrust requirements and improves chip evacuation during drilling. This bit is installed and used by aviation maintenance technicians, machinists, and sheet metal workers.

This drill bit is built for general-purpose metal drilling applications where extended reach is required. Its 6-inch overall length and 2.875-inch spiral flute make it effective in applications such as drilling through aircraft skins, structural channels, and deep-set fastener holes. The straight cylindrical shank fits standard drill chucks without adapters. It cuts right-hand and conforms to NAS 907 standards, which governs aircraft-quality drill bits used in aerospace and defense maintenance environments.

Key Features

• Letter F size with 0.2570-inch decimal diameter for precise hole sizing
• 135-degree split point is self-centering and reduces drill walk on hard or smooth surfaces
• Web-thinned tapered web lowers cutting resistance and improves chip clearance
• 6-inch overall length with 2.875-inch spiral flute provides extended reach into confined areas
• High-speed steel construction with oxide finish for general-purpose metal drilling durability
• Meets NAS 907 aircraft-quality drill bit standard

Compatibility

Designed as an OEM-style aircraft extension drill bit suitable for use in standard drill chucks accepting a 0.2570-inch straight cylindrical shank, for general-purpose drilling applications in aerospace maintenance and metal fabrication.

Installation Notes

This bit is typically used by aviation maintenance technicians and machinists working with hand drills or drill presses. Secure the workpiece and confirm the chuck is properly tightened before operation. Use appropriate cutting fluid when drilling hard metals to extend tool life and maintain hole quality. Follow applicable shop safety procedures and relevant aviation maintenance manual guidance when drilling structural components.