Hertel C.E05.0485 Aircraft Extension Drill Bit No. 11

Product Description

The HERTEL C.E05.0485 is a No. 11 wire-size aircraft extension drill bit engineered for deep-reach drilling applications that standard-length bits cannot access. Built from high-speed steel with an oxide finish, it measures 12 inches in overall length and features a 135-degree split point that is self-centering and reduces walking on entry. The spiral flute design with a tapered web configuration promotes chip evacuation over the 2.3125-inch flute length. This bit is suited for general-purpose drilling in metals, composites, and structural materials commonly encountered in aircraft maintenance and fabrication environments. It is installed by aerospace mechanics, machinists, and trade professionals working in tight or extended-reach drilling situations.

The C.E05.0485 is intended for use in extended-reach drilling scenarios where standard drill bit lengths are insufficient. Its straight cylindrical shank fits standard drill chucks without adapters. The right-hand cutting direction and web-thinned geometry make it appropriate for drilling aluminum, mild steel, and similar materials in structural repair, sheet metal work, and general fabrication. The bit conforms to NAS 907 standards, which are commonly referenced in aerospace and precision machining specifications.

Key Features

• No. 11 wire size (0.1910 inches decimal) for precise hole sizing
• 135-degree split point with self-centering entry reduces bit walking
• 12-inch overall length provides extended reach into confined or deep workpieces
• High-speed steel construction with oxide finish for general-purpose durability
• Web-thinned tapered web reduces thrust and improves cutting efficiency
• Conforms to NAS 907 standard for aerospace-grade dimensional accuracy

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard drill chucks accepting a 0.1910-inch straight cylindrical shank, suitable for right-hand drilling applications in metal and composite materials.

Installation Notes

This bit is typically used by machinists, aerospace mechanics, and sheet metal technicians operating handheld or drill press equipment. Secure the straight cylindrical shank firmly in the chuck before operation and verify the drill is set to right-hand rotation. Always wear appropriate eye protection and secure the workpiece to prevent movement during drilling. Do not exceed the rated material hardness range for high-speed steel tooling.