Hertel C.E07.0794 Aircraft Extension Drill Bit 5/16 in Cobalt

Product Description

The HERTEL C.E07.0794 is a cobalt aircraft extension drill bit designed for drilling in hard metals, high-strength alloys, and aerospace-grade materials where a standard-length bit cannot reach. The 5/16 inch diameter bit has a 12 inch overall length, making it well suited for deep-reach drilling applications in confined or extended access areas. The 135 degree split point is self-centering, reducing the need for a center punch and minimizing walking on entry. A straw finish indicates heat treatment consistent with cobalt tooling. This bit is appropriate for use by machinists, aircraft maintenance technicians, and industrial trades working with ferrous and non-ferrous materials.

This drill bit is built for general purpose drilling in applications that demand extended reach, including airframe work, structural steel fabrication, sheet metal stacking, and general industrial machining. The spiral flute geometry with a tapered web and web-thinned point improves chip evacuation during deep-hole drilling. Right-hand cutting direction is standard for use with conventional drill presses, hand drills, and magnetic base drills. The bit meets NAS 907 standards, which are commonly referenced in aerospace and defense maintenance operations.

Key Features

• 5/16 inch diameter with 12 inch overall length for deep-reach and confined-area drilling
• 135 degree split point is self-centering, reducing setup time and center-punch dependency
• Cobalt tool material with straw finish for heat resistance and durability in hard metals
• Spiral flute with tapered web and web-thinned geometry for efficient chip removal
• Straight cylindrical shank, 5/16 inch diameter, compatible with standard drill chucks
• Meets NAS 907 standard

Compatibility

Designed as an OEM-style general purpose aircraft extension drill bit compatible with standard 5/16 inch drill chucks on hand drills, drill presses, and magnetic base drills.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotary cutting tools and applicable workplace safety standards. Secure the workpiece and verify chuck grip before operation. Use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and manage heat buildup. Inspect the cutting edges before each use and remove from service if the point shows signs of chipping or deformation.