Hertel C.E06.0226 Aircraft Extension Drill Bit 43 Cobalt

Product Description

The HERTEL C.E06.0226 is a cobalt aircraft extension drill bit designed for drilling in hard, high-strength materials where standard-length bits cannot reach. Built to wire size 43 (0.0890 inches decimal), it features a 135-degree split point that self-centers on contact, eliminating the need for a center punch in most applications. The straw finish indicates cobalt content suited for elevated heat resistance. With a 6-inch overall length and a right-hand spiral flute, this bit clears chips efficiently during deep-reach drilling operations. It is typically installed by aerospace technicians, machinists, and industrial maintenance professionals working on structural assemblies or confined access areas.

This bit is intended for use in materials such as stainless steel, titanium, high-nickel alloys, and other difficult-to-machine metals where cobalt tooling is the standard choice. The extended 6-inch overall length provides access in fuselage panels, structural channels, and tight machine frames where standard jobber-length bits fall short. The 1.25-inch flute length handles moderate chip evacuation in shallow to mid-depth holes appropriate for the wire 43 diameter. Meets NAS 907 standards, making it suitable for aerospace and defense maintenance environments.

Key Features

• Wire size 43 diameter (0.0890 inches decimal) with matching straight-cylindrical shank
• 135-degree split point with web-thinned, tapered web for self-centering entry
• Cobalt tool material with straw finish for heat and wear resistance in hard metals
• 6-inch overall length for extended reach into confined or deep-access locations
• Right-hand cut, 2-flute spiral configuration for efficient chip evacuation
• Meets NAS 907 standard for aerospace-grade tooling

Compatibility

General-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks accepting a 0.0890-inch shank diameter. Suitable for use in hand drills, drill presses, and pneumatic drill motors configured for right-hand rotation.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cobalt tooling practices. Secure the workpiece firmly before drilling and confirm the chuck is properly tightened on the straight-cylindrical shank before operation. Use appropriate cutting fluid or lubricant when drilling stainless steel, titanium, or high-nickel alloys to extend tool life and maintain hole tolerance. Inspect the bit for chipping or wear before each use, as cobalt bits used beyond serviceable condition can fracture under load.