Hertel C.E07.0522 Aircraft Extension Drill Bit Size 5

Product Description

The HERTEL C.E07.0522 is a cobalt aircraft extension drill bit built for deep-reach drilling applications where standard-length bits cannot access the work. Sized to wire gauge number 5 (0.2055 inches decimal), it features a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on hard or curved surfaces. The straw finish is a heat-treatment indicator consistent with high-speed cobalt steel. At 12 inches overall length with a 2.5-inch spiral flute, this bit is designed for licensed aircraft maintenance technicians, machinists, and skilled tradespeople working in confined or deep-reach locations.

Aircraft extension bits like the C.E07.0522 are used in aerospace maintenance, structural fabrication, and general metalworking where drilling through layered materials or deep cavities is required. The cobalt construction handles harder alloys including stainless steel and titanium-bearing materials better than standard high-speed steel bits. The straight cylindrical shank seats in standard drill chucks without adapters. This bit meets NAS 907 standards, which govern aircraft drill bit geometry and performance.

Key Features

• Wire size number 5 (0.2055 inches decimal) straight cylindrical shank for standard chuck compatibility
• 135-degree split point with web-thinned, tapered web for self-centering entry and reduced thrust load
• Cobalt tool material for superior heat resistance and extended tool life in hard and abrasive metals
• 12-inch overall length enables deep-reach and offset drilling in confined airframe and structural applications
• 2.5-inch spiral flute with right-hand cutting direction for efficient chip evacuation
• Straw finish and NAS 907 compliance confirm aerospace-grade geometry and heat treatment

Compatibility

Designed as a general-purpose aircraft extension drill bit suitable for use in aerospace maintenance, structural metalworking, and precision drilling applications requiring a wire size number 5 diameter and extended reach. Conforms to NAS 907 standards.

Installation Notes

Install in a standard drill chuck that accepts a 0.2055-inch straight cylindrical shank. Secure the workpiece firmly before drilling to prevent movement, especially when using extension-length bits where lateral flex can occur. Use appropriate cutting fluid or lubricant when drilling hard alloys to extend tool life and maintain dimensional accuracy. Wear appropriate personal protective equipment including eye protection when operating.