Hertel C.E03.0373 Aircraft Extension Drill Bit No. 26

Product Description

The HERTEL C.E03.0373 is a No. 26 wire gauge aircraft extension drill bit engineered for deep-reach drilling in aerospace and precision metalworking applications. Built from high-speed steel with an oxide finish, it delivers a 6-inch overall length with a 1.875-inch spiral flute and a 135-degree split point with web thinning for self-centering starts and reduced thrust. The straight cylindrical shank measures 0.1470 inches in diameter, matching the cutting diameter exactly. This bit meets NAS 907 standards and is suited for right-hand cutting in general-purpose drilling operations where extended reach is required.

This aircraft extension drill bit is designed for use in tight spaces and deep-hole applications common to sheet metal fabrication, aircraft assembly, and structural drilling. The extended 6-inch body allows access to recessed or blind locations that standard-length bits cannot reach. HVAC, mechanical, and sheet metal trades also use bits of this type when drilling through deep framing, ductwork flanges, or structural members where a standard jobber-length bit falls short. Sold individually.

Key Features

• No. 26 wire gauge size, 0.1470 inches cutting diameter for precision hole sizing
• 135-degree split point with web thinning for self-centering entry and reduced drill pressure
• 6-inch overall length provides extended reach for deep or obstructed drilling locations
• High-speed steel construction with oxide finish for corrosion resistance and heat tolerance
• Two-flute spiral design with tapered web configuration for efficient chip evacuation
• Meets NAS 907 standard for aircraft-quality tooling

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard 3-jaw drill chucks accepting a 0.1470-inch straight cylindrical shank. Suitable for use in portable drills, drill presses, and right-angle drill attachments used in sheet metal and structural drilling.

Installation Notes

Installation and use should be performed by qualified machinists, sheet metal workers, or trades professionals familiar with rotary cutting tools. Ensure the workpiece is secured and the drill is powered off before inserting or removing the bit from the chuck. Use appropriate cutting fluid when drilling ferrous metals to extend tool life and reduce heat buildup. Eye protection and proper chip guards are required per standard shop safety practice.