Hertel C.E07.0161 Aircraft Extension Drill Bit 52

Product Description

The HERTEL C.E07.0161 is a cobalt aircraft extension drill bit designed for demanding drilling applications where standard-length bits cannot reach. Built to wire gauge size 52 (0.0635 inches decimal), this bit features a 135-degree split point that self-centers on contact, reducing walking and the need for a center punch. The straw finish indicates heat-treated cobalt construction suited for harder materials. At 12 inches overall length, it gives technicians extended reach into deep or recessed workpieces. Two right-hand spiral flutes evacuate chips efficiently during through-hole drilling in metal fabrication and aerospace-adjacent work.

This aircraft extension drill bit is used in applications requiring deep-reach drilling, including structural metalwork, sheet metal assemblies, and maintenance repair operations on aircraft or industrial equipment. The 7/8-inch (0.8750 inches) flute length handles thin to moderate material thickness. It is installed and operated by machinists, aviation mechanics, and maintenance technicians working to NAS 907 standards. The straight cylindrical shank fits standard drill chucks without adapters.

Key Features

• Wire size 52 (0.0635 inches) with matching straight cylindrical shank diameter for precise chuck fit
• 135-degree self-centering split point eliminates walking and reduces need for a center punch
• Cobalt tool material with straw finish for improved hardness and heat resistance in tough materials
• 12-inch overall length provides extended reach into deep or confined workspaces
• Right-hand spiral flute with tapered web and web-thinned geometry for efficient chip evacuation
• Meets NAS 907 standard for aircraft-grade tooling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks accepting a 0.0635-inch shank diameter.

Installation Notes

This bit is intended for use by qualified machinists or aviation maintenance technicians. Secure the straight cylindrical shank firmly in a calibrated drill chuck before operation and confirm concentricity to avoid bit deflection at extended length. Always wear appropriate eye protection and follow applicable workplace safety codes when drilling metal. Reduce feed pressure near breakthrough to prevent burring or bit grab.