Hertel C.E03.0386 Aircraft Extension Drill Bit 135 Pt Hss

Product Description

The HERTEL C.E03.0386 is a wire-gauge size 24 aircraft extension drill bit engineered for deep-reach drilling applications where a standard-length bit cannot access the work surface. Built from high-speed steel with an oxide finish, it runs at a 0.1520 inch decimal diameter and features a 135-degree split point that self-centers on contact, reducing walking and minimizing the need for a center punch. The spiral flute geometry and web-thinned, tapered web configuration promote chip evacuation in deep holes. This bit is a general-purpose cutting tool designed for use by machinists, aircraft maintenance technicians, and sheet metal workers.

Aircraft extension drill bits like the C.E03.0386 are used in situations where standard-length bits cannot reach — behind panels, through structural members, and into recessed assemblies common in aerospace, automotive, and light fabrication work. The 6 inch overall length and 2 inch flute length make it suited for drilling through stacked materials or elongated access paths. Right-hand cutting direction is compatible with conventional drill press and hand-drill setups. Conforms to NAS 907 standards, making it appropriate for aerospace maintenance and repair operations.

Key Features

• 135-degree split point with self-centering geometry reduces bit walking on entry
• Web-thinned, tapered web lowers thrust requirements and improves chip flow
• High-speed steel construction handles a wide range of metals including aluminum, mild steel, and sheet stock
• Oxide finish provides mild corrosion resistance and reduces friction during cutting
• 6 inch overall length provides extended reach for deep or obstructed drilling locations
• Conforms to NAS 907 standard for aerospace-grade drill bit performance

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907, suitable for use with standard straight-shank drill chucks on drill presses, hand drills, and right-angle drill attachments that accept a 0.1520 inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or aircraft maintenance technicians familiar with NAS standards and applicable maintenance manuals. Secure the workpiece and ensure the drill chuck is fully tightened before operation. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.