Hertel C.E05.0287 Aircraft Extension Drill Bit No. 33

Product Description

The HERTEL C.E05.0287 is an aircraft extension drill bit designed for drilling in hard-to-reach locations where a standard-length bit cannot access the work area. Built from high-speed steel with an oxide finish, it carries a 135-degree split point that is self-centering and reduces walking on entry, eliminating the need for a center punch in most setups. The bit measures 12 inches in overall length and features a 1.5-inch spiral flute with a right-hand cutting direction. Web thinning with a tapered web configuration reduces thrust and improves chip evacuation. It is sized at No. 33 wire gauge, corresponding to 0.1130 inch in decimal, and meets NAS 907 standards for aircraft drilling applications. Licensed technicians and aerospace maintenance crews are the primary installers.

This bit is suited for structural drilling tasks in aerospace, aviation maintenance, and sheet metal work where extended reach is required. The 12-inch body provides clearance for drilling through airframe structures, stringers, or bulkheads in confined spaces. General-purpose tool performance makes it appropriate for ferrous and non-ferrous metals encountered in aircraft maintenance environments. It is sold and packaged individually.

Key Features

• No. 33 wire gauge size, 0.1130 inch decimal diameter for precise hole sizing
• 135-degree split point with self-centering tip reduces walking and eliminates center-punch requirement
• 12-inch overall length provides extended reach into confined structural areas
• High-speed steel construction with oxide finish for general-purpose metal drilling
• Web-thinned tapered web reduces cutting thrust and improves chip flow
• Meets NAS 907 standard for aircraft drilling applications

Compatibility

Designed as an OEM-style replacement or direct-use aircraft extension drill bit for general-purpose drilling operations in aviation maintenance and aerospace fabrication applications meeting NAS 907 requirements.

Installation Notes

Installation and use of this bit should be performed by qualified aviation maintenance technicians or licensed metalworking professionals following applicable aircraft maintenance manuals and workplace safety protocols. Secure the bit firmly in the drill chuck and verify runout before drilling. Always wear appropriate eye protection and secure the workpiece before beginning any drilling operation. Discontinue use if the cutting edges show signs of wear or if the bit exhibits vibration during operation.