Hertel C.E05.0909 Aircraft Extension Drill Bit Letter T

Product Description

The HERTEL C.E05.0909 is an aircraft extension drill bit designed for deep-reach drilling applications in aerospace and industrial environments. Built from high-speed steel with an oxide finish, this bit measures 12 inches in overall length and features a 135-degree split point that is self-centering, reducing walking on entry without the need for a center punch. The spiral flute design and web-thinned, tapered web configuration promote efficient chip evacuation during extended drilling operations. Licensed tradespeople and aerospace maintenance technicians working on airframe structures will find this bit suited to tight-tolerance work in metal substrates.

This aircraft extension drill bit is sized at Letter T, which corresponds to 0.3580 inches in decimal equivalent. The extended 12-inch overall length and 3.5-inch flute length make it well suited for drilling through deep structural members, rivet hole preparation, and other reach-limited applications where standard-length bits cannot access the work area. It cuts in a right-hand direction and is classified as a general-purpose tool, making it useful across a range of ferrous and non-ferrous metals commonly found in aircraft and heavy industrial assemblies.

Key Features

• Letter T size, 0.3580 inch decimal equivalent, with straight cylindrical shank matching the drill diameter
• 135-degree split point with self-centering geometry reduces setup time and eliminates pre-punching on most applications
• High-speed steel construction with oxide finish for improved heat resistance and lubricity during extended cuts
• 12-inch overall length with 3.5-inch spiral flute for deep-reach access in confined or structural drilling scenarios
• Web-thinned, tapered web reduces thrust force and improves chip flow in harder materials
• Meets NAS 907 standard for aircraft extension drill bits

Compatibility

Designed as a general-purpose aircraft extension drill bit suitable for use in aerospace maintenance, airframe fabrication, and industrial drilling applications requiring extended reach in metal materials.

Installation Notes

This bit is installed and used by aerospace maintenance technicians, machinists, and industrial tradespeople following applicable workplace safety and aviation maintenance standards. Secure the bit firmly in a compatible drill chuck sized for a 0.3580-inch straight cylindrical shank before operation. Use appropriate cutting fluid or lubricant when drilling ferrous metals to prolong tool life and maintain dimensional accuracy. Inspect the cutting edges and flutes for wear or damage before each use and replace the bit if chipping or deformation is observed.