Hertel C.E07.0282 Aircraft Extension Drill Bit 34 Cobalt

Product Description

The HERTEL C.E07.0282 is a cobalt aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work area. Built to a 12-inch overall length with a 1.5-inch spiral flute, this bit uses a 135-degree split point geometry that is self-centering on contact, reducing the need for a center punch and minimizing walking on hard or curved surfaces. The straw finish is a heat-indicator coating common on cobalt tooling. With a straight cylindrical shank diameter of 0.1110 inches and a wire gauge size of 34, this bit is suited for precision hole work in metals and composite materials. Installation and use typically falls to machinists, aerospace maintenance technicians, and experienced fabricators.

Aircraft extension drill bits of this type are used in structural repair, airframe fabrication, and tight-clearance assembly work where standard drill bit reach is insufficient. The cobalt construction makes this bit appropriate for drilling stainless steel, high-strength alloys, hardened steel, and titanium — materials common in aerospace and heavy industrial settings. The 2-flute spiral configuration clears chips efficiently during extended-reach drilling. Meets NAS 907 standards, making it suitable for aerospace maintenance and repair applications where material traceability and dimensional conformance are required.

Key Features

• 135-degree split point is self-centering and reduces drill walking on hard surfaces
• Cobalt tool material handles high-heat drilling in stainless steel, titanium, and hardened alloys
• 12-inch overall length provides deep-reach access in confined structural cavities
• Web-thinned tapered web reduces thrust load and improves chip evacuation
• Straw finish serves as a heat-treatment indicator consistent with cobalt high-speed steel processing
• Meets NAS 907 standard for aerospace drill bit dimensional and material requirements

Compatibility

Designed as an OEM-style replacement or direct-use aircraft extension drill bit for applications requiring a wire gauge size 34 (0.1110-inch decimal) cobalt bit with a 12-inch overall length and straight cylindrical shank, conforming to NAS 907.

Installation Notes

This bit is intended for use by machinists, aerospace technicians, and metal fabricators operating drill presses, magnetic-base drills, or pneumatic right-angle drill motors. Secure the straight cylindrical shank fully in the chuck before operation to prevent runout and premature wear. Use appropriate cutting fluid or coolant when drilling stainless steel or titanium to extend tool life and control heat. Inspect the split point for chipping or wear before each use and replace the bit if edge integrity is compromised.