Hertel C.E06.0258 Aircraft Extension Drill Bit 38 Cobalt

Product Description

The HERTEL C.E06.0258 is a cobalt aircraft extension drill bit designed for drilling in tight-clearance and deep-reach applications. Built to NAS 907 standards, this bit features a 135-degree split point that is self-centering and reduces walking on entry, making it well-suited for work on hard metals and alloys. The cobalt construction provides heat resistance and durability under sustained cutting loads. At 6 inches overall length with a 1.4375-inch spiral flute, it delivers the reach needed for aircraft-style drilling tasks. The straw finish indicates heat treatment and is typical of cobalt tooling in this class. Installation is handled by machinists, maintenance technicians, and aviation MRO professionals.

This drill bit is intended for use in metal fabrication, aerospace maintenance, and general-purpose drilling in ferrous and non-ferrous materials. The straight cylindrical shank fits standard drill chucks and right-angle drill attachments commonly used in aircraft maintenance and industrial assembly work. The web-thinned, tapered web configuration reduces cutting resistance and improves chip evacuation in deep-hole applications. Wire size 38 corresponds to a decimal diameter of 0.1015 inches, making it appropriate for close-tolerance hole sizing in structural and sheet metal work.

Key Features

• Cobalt tool material for heat resistance and extended tool life in hard metals
• 135-degree split point is self-centering and reduces drill walking on entry
• Web-thinned tapered web reduces cutting resistance and improves chip clearance
• 6-inch overall length provides extended reach for aircraft and deep-access drilling
• Straw finish consistent with cobalt heat-treated tooling
• Meets NAS 907 standards for aircraft extension drill bits

Compatibility

Designed as an OEM-style replacement and standard-production aircraft extension drill bit for use in any right-hand drill chuck accepting a 0.1015-inch straight cylindrical shank, conforming to NAS 907 specifications.

Installation Notes

This bit is installed by machinists, aircraft maintenance technicians, and industrial maintenance professionals. Secure the straight shank firmly in the drill chuck before use and verify chuck key is removed prior to operation. Use appropriate cutting fluid for ferrous materials to extend bit life and maintain hole tolerance. Follow applicable workplace safety standards and equipment manufacturer guidelines when operating drill equipment.