Hertel C.E06.0505 Aircraft Extension Drill Bit 8 Cobalt

Product Description

The HERTEL C.E06.0505 is a cobalt aircraft extension drill bit designed for drilling in tough materials where standard-length bits cannot reach. Built to wire size 8 (0.1990 inches), it features a 135-degree split point that is self-centering and eliminates the need for a center punch in most applications. The straw finish is a heat-treatment indicator consistent with cobalt tooling. With a 6-inch overall length and right-hand spiral flute geometry, this bit is suited for aerospace, fabrication, and maintenance technicians who need extended reach in confined or deep drilling situations.

This bit is engineered for general-purpose drilling in steel, stainless, and other high-strength materials where cobalt composition provides heat and wear resistance. The extended length makes it particularly useful in aircraft structural work, deep cross-member drilling, and equipment maintenance where standard jobber-length bits fall short. The straight cylindrical shank accepts standard three-jaw drill chucks. It meets NAS 907 standards, making it appropriate for aerospace-specification work.

Key Features

• Wire size 8 diameter: 0.1990 inches straight cylindrical shank
• 135-degree split point with web thinning for self-centering starts and reduced feed pressure
• Cobalt tool material with straw finish for extended tool life in hard and abrasive materials
• 6-inch overall length with 2.4375-inch (2-7/16 inches) spiral flute for extended reach applications
• Right-hand cutting direction with 2-flute tapered web configuration
• Meets NAS 907 standard for aerospace drilling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with any standard three-jaw drill chuck accepting a 0.1990-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists, aircraft maintenance technicians, and fabricators using standard drill presses, hand drills, or right-angle drill attachments. Secure the workpiece before drilling and verify chuck grip on the full shank length to prevent slippage during extended-reach operations. Use appropriate cutting fluid when drilling hardened or stainless steel to preserve bit life. Always wear eye protection when operating rotary cutting tools.