Hertel C.E06.0498 Aircraft Extension Drill Bit Cobalt

Product Description

The HERTEL C.E06.0498 is a cobalt aircraft extension drill bit sized to wire gauge number 9 (0.1960 inches decimal), designed for drilling in hard metals and aerospace-grade materials where standard-length bits cannot reach. The 135-degree split point with web thinning allows self-centering entry without a center punch, reducing walking on hardened surfaces. With a 6-inch overall length and a 2.4375-inch spiral flute, this bit provides the extended reach required for structural and skin-drilling applications. A straw finish indicates heat treatment to cobalt grade, and the straight cylindrical shank accepts standard drill chucks without adapters. Installation is performed by HVAC, maintenance, and metalworking trades as well as aviation and structural mechanics.

This aircraft extension drill bit is suited for general-purpose drilling in steel, stainless, cast iron, and hard alloys where extra reach is needed to access recessed or deep-set hole locations. The two-flute spiral design clears chips efficiently in through-hole and blind-hole drilling scenarios. Its extended body makes it practical for drilling through structural members, panels, or assemblies where a standard jobber-length bit would not fit. This bit meets NAS 907 standards, confirming dimensional and performance compliance for aerospace and industrial use.

Key Features

• Cobalt tool material for heat resistance and durability in hard-metal drilling
• 135-degree split point with web thinning for self-centering, no center punch required
• 6-inch overall length with 2.4375-inch flute for extended-reach applications
• Straw finish indicating cobalt-grade heat treatment for improved hardness
• Right-hand spiral flute with tapered web configuration for efficient chip evacuation
• Meets NAS 907 dimensional and performance standard

Compatibility

Designed as a general-purpose aircraft extension drill bit for use in standard straight-cylindrical-shank drill chucks across industrial, aerospace, and structural drilling applications requiring wire gauge number 9 (0.1960 inches) hole diameters.

Installation Notes

This bit is installed and operated by machinists, aviation mechanics, or experienced metalworking tradespeople using a compatible drill press, hand drill, or right-angle drill with a straight-shank chuck. Secure the workpiece firmly before drilling and use appropriate cutting fluid on hard or stainless alloys to extend bit life. Inspect the cutting edges and web area before each use; discard if chipping or heat discoloration beyond the straw finish is observed. Follow applicable shop safety and PPE requirements when operating rotary cutting tools.