Hertel C.E07.0498 Aircraft Drill Bit Wire 9 Cobalt

Product Description

The HERTEL C.E07.0498 is a cobalt aircraft extension drill bit engineered for drilling into hard metals and aerospace-grade materials where standard-length bits cannot reach. It carries a wire gauge size of 9 (0.1960 inches decimal) and a 135-degree split point that self-centers on contact, reducing the need for a center punch. The straw finish is characteristic of cobalt tooling and provides mild heat resistance during high-speed drilling. At 12 inches overall length with a 2.4375-inch spiral flute, this bit is suited for deep-reach applications that demand rigidity without sacrificing chip evacuation.

Aircraft extension drill bits like the C.E07.0498 are used in aerospace fabrication, structural metalwork, and industrial maintenance where access is restricted or hole depth exceeds the reach of standard jobber-length bits. The right-hand spiral flute and web-thinned, tapered web construction allow efficient cutting in steel, stainless, aluminum, and other alloys. This is a general-purpose bit appropriate for machine or handheld drill use in both shop and field environments where NAS 907 tooling standards apply.

Key Features

• Cobalt construction with straw finish for improved heat and wear resistance in hard metals
• 135-degree split point with self-centering geometry eliminates the need for a center punch
• Extended 12-inch overall length provides deep-reach access in confined or structural applications
• Web-thinned, tapered web reduces thrust force and improves cutting efficiency
• Straight cylindrical shank fits standard drill chucks without adapters
• Right-hand, 2-flute spiral design promotes consistent chip evacuation

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 standards, suitable for use in standard drill chucks accepting a 0.1960-inch straight cylindrical shank.

Installation Notes

This bit is installed by machinists and metalworkers using handheld drills, drill presses, or CNC equipment. Secure the straight shank firmly in a keyed or keyless chuck before operation. Use appropriate cutting fluid or coolant when drilling hard alloys to manage heat buildup and extend tool life. Inspect the cutting edge for wear or chipping before each use and replace when performance degrades to avoid workpiece damage.