Hertel C.E03.0437 Aircraft Extension Drill Bit 11/64 in Hss

Product Description

The HERTEL C.E03.0437 is an aircraft extension drill bit designed for reaching into deep or recessed work areas where a standard-length bit cannot access. Built from high-speed steel with an oxide finish, it measures 11/64 inch (0.1719 inch decimal) in diameter with a 6-inch overall length and a 2.125-inch spiral flute. The 135-degree split point is self-centering and web-thinned, reducing walking on entry and lowering the thrust force needed to start a hole. The straight cylindrical shank seats securely in standard drill chucks. This bit is suited for general-purpose drilling in metal, plastic, and similar materials and is a common tool for aircraft mechanics, maintenance technicians, and fabricators working in tight or extended-reach applications.

This drill bit is used in aircraft maintenance, sheet metal fabrication, HVAC equipment assembly, and general mechanical work where extended reach is required. The 6-inch overall length gives clearance to drill through panels, frames, or structural members without repositioning the drill body. Right-hand cutting direction suits all standard drill drivers and drill presses. Its general-purpose classification makes it appropriate for a range of ferrous and non-ferrous base materials encountered in the field.

Key Features

• 135-degree split point is self-centering, reducing bit walk on entry
• Web-thinned, tapered web lowers thrust and improves chip clearance
• 6-inch overall length provides extended reach into recessed or deep work areas
• High-speed steel construction with oxide finish for heat and wear resistance
• 2-flute spiral design promotes chip evacuation during drilling
• Straight cylindrical shank fits standard 3-jaw drill chucks

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard drill chucks accepting an 11/64-inch straight cylindrical shank, suitable for use in portable drills and drill presses across maintenance and fabrication applications.

Installation Notes

This bit is installed and used by aircraft mechanics, maintenance technicians, and sheet metal fabricators. Secure the straight shank firmly in the drill chuck before use and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and control heat. Inspect the cutting edges and point for wear or chipping before each use and replace when dulling is evident to maintain hole accuracy and prevent bit breakage.