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The HERTEL C.E06.0386 is a cobalt aircraft extension drill bit designed for demanding drilling applications where standard-length bits cannot reach. Built to a 135-degree split-point geometry with a web-thinned, tapered web configuration, it self-centers on contact and reduces the thrust required to start a hole without a center punch. The straw finish indicates a heat-treated cobalt substrate suited for harder workpiece materials. At 6 inches in overall length with a 2-inch spiral flute, this bit handles deep-reach scenarios in sheet metal, structural components, and assemblies common to aviation maintenance and industrial fabrication work.
This bit is sized to wire gauge 24, corresponding to 0.1520 inches decimal diameter, with a matching straight cylindrical shank of the same diameter. It is used in aerospace maintenance, general metalworking, and industrial fabrication where extended reach into a workpiece or assembly structure is required. The right-hand cutting direction and two-flute spiral configuration are standard for general-purpose drilling in both hand-held and machine-mounted drill applications. It meets NAS 907 standards, making it suitable for aviation-grade work where dimensional and material certifications are required.
Designed as a general-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks in hand drills, drill presses, and right-angle drill motors used in aerospace maintenance and industrial metalworking.
Installation and use of this bit should be performed by machinists, aviation maintenance technicians, or qualified trade professionals familiar with proper drilling technique and tool handling. Secure the workpiece and ensure the drill chuck is tightened fully before operation. Inspect the cutting edges before use and replace the bit if chipping or excessive wear is present. Follow applicable shop safety procedures and relevant industry standards when drilling aerospace-grade materials.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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