Hertel C.E03.0980 Aircraft Extension Drill Bit Letter W

Product Description

The HERTEL C.E03.0980 is an aircraft extension drill bit sized to Letter W (0.3860 inches decimal) with a 135-degree split point and a web-thinned, tapered web configuration. Built from high-speed steel with an oxide finish, it is designed for general-purpose drilling in aerospace and industrial applications where extended reach is required. The 6-inch overall length and 3.75-inch spiral flute give technicians access to deep or obstructed hole locations that standard-length bits cannot reach. Two right-hand flutes provide efficient chip evacuation, and the self-centering split point reduces walking on entry without requiring a center punch.

This bit is suited for use in aircraft maintenance, sheet metal fabrication, and structural assembly work where access to recessed or tight areas is a common job requirement. The straight cylindrical shank seats cleanly in standard drill chucks and right-angle drill attachments frequently used in aviation and industrial trade environments. It is intended for installation by aircraft mechanics, machinists, and experienced trade professionals working to NAS 907 standards.

Key Features

• Letter W size (0.3860 inches) with 135-degree split point for self-centering entry
• Web-thinned tapered web reduces thrust and improves penetration efficiency
• High-speed steel construction with oxide finish for wear resistance
• 3.75-inch spiral flute length supports deep-reach drilling applications
• Right-hand cutting direction with two flutes for effective chip removal
• Meets NAS 907 standard for aircraft drill bit performance

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks and right-angle drill attachments used in aerospace, sheet metal, and industrial drilling applications.

Installation Notes

Installation and use should be performed by qualified mechanics or machinists familiar with drilling procedures for aerospace and structural materials. Secure the workpiece before drilling and confirm the shank is fully seated and locked in the chuck before operation. Follow applicable shop safety procedures and any relevant NAS or OEM specifications for the material being drilled. Inspect the cutting edges for wear or damage before each use and replace the bit if chipping or excessive dullness is observed.