Hertel C.E06.0373 Aircraft Extension Drill Bit 26 Cobalt

Product Description

The HERTEL C.E06.0373 is a cobalt aircraft extension drill bit designed for drilling in tight-clearance and deep-reach applications common in aerospace, structural, and sheet metal work. Built from cobalt high-speed steel with a straw finish, it carries a 135-degree split point that is self-centering and web-thinned, reducing walking and cutting force at entry. The straight cylindrical shank measures 0.1470 inches in diameter, matching the wire size 26 drill designation. With a 6-inch overall length and a 1.875-inch spiral flute, this bit reaches into confined areas that standard-length bits cannot access. It conforms to NAS 907 standards and is suited for right-hand cutting with a two-flute, tapered web configuration.

This bit is used in applications requiring extended reach into structural assemblies, aircraft panels, or fabricated metal components. The cobalt construction handles harder materials including stainless steel, high-strength alloys, and hardened steels that would accelerate wear in standard HSS bits. It is appropriate for general-purpose production drilling in aerospace maintenance, sheet metal fabrication, and industrial maintenance environments. Machinists, aerospace technicians, and metal fabricators typically select this bit when standard extension lengths are insufficient and precision entry is required.

Key Features

• Cobalt construction with straw finish for improved heat and wear resistance in hard materials
• 135-degree split point with web thinning reduces walking and entry force
• Self-centering tip eliminates the need for a center punch on most surfaces
• 6-inch overall length provides extended reach for deep or obstructed drilling locations
• Straight cylindrical shank for use in standard drill chucks and drill motors
• Conforms to NAS 907 standards for aircraft-grade tooling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit in wire size 26 (0.1470 inches) for use in standard straight-shank drill chucks; suitable for drilling steel, stainless steel, and high-strength alloys in aerospace and industrial applications.

Installation Notes

This bit is installed and operated by machinists, aerospace technicians, and metal fabricators using standard hand drills, drill presses, or pneumatic drill motors with a compatible straight-shank chuck. Secure the shank fully in the chuck before operation and verify chuck key removal before starting. Use appropriate cutting fluid for hard materials to extend tool life and maintain hole quality. Inspect the cutting edges before each use and replace if chipping or excessive wear is observed.