Hertel C.E03.0485 Aircraft Extension Drill Bit No. 11

Product Description

The HERTEL C.E03.0485 is an aircraft extension drill bit designed for deep-reach drilling in aerospace maintenance, sheet metal work, and structural fabrication. Built from high-speed steel with an oxide finish, this bit carries a No. 11 wire gauge size, translating to a decimal diameter of 0.191 inches. The 135-degree split point is self-centering and web-thinned, reducing walking on entry and lowering the thrust force needed to initiate the cut. A spiral flute design clears chips efficiently across the 2.3125-inch flute length. The overall length of 6 inches provides the extended reach required for hard-to-access bore locations. Licensed HVAC techs, aircraft mechanics, and structural metalworkers are the primary users.

This bit is suited for general-purpose drilling in metal substrates where standard-length bits cannot reach the work surface. The extended shank allows access through panels, frames, and structural members in tight or recessed installations. The straight cylindrical shank seats directly into standard drill chucks without adapters. Right-hand cutting direction is standard for conventional drill presses and hand drills. Meets NAS 907 standards, making it appropriate for aerospace and defense maintenance environments where documented performance criteria are required.

Key Features

• No. 11 wire size, 0.191 inches decimal diameter for precise hole sizing
• 135-degree split point with web thinning and tapered web configuration for self-centering entry
• 6-inch overall length provides extended reach into recessed or obstructed bore locations
• High-speed steel construction with oxide finish for heat and wear resistance
• 2.3125-inch spiral flute length promotes efficient chip evacuation during drilling
• Meets NAS 907 standard for aerospace and structural applications

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with any standard drill chuck accepting a 0.191-inch straight cylindrical shank, suitable for use in aerospace maintenance, sheet metal fabrication, and structural metalwork applications.

Installation Notes

Installation of this bit should be performed by a qualified mechanic, metalworker, or maintenance technician familiar with drilling operations in metal substrates. Secure the straight shank firmly in the drill chuck before use and verify chuck key removal prior to powering the tool. Always wear appropriate eye protection and secure the workpiece to prevent movement during drilling. Do not exceed the recommended speed range for the material being drilled, and allow the flute geometry to clear chips naturally without forcing feed rate.