Hertel C.E07.0199 Aircraft Extension Drill Bit Size 47

Product Description

The HERTEL C.E07.0199 is a cobalt aircraft extension drill bit designed for precision drilling in aerospace and industrial applications. Built to NAS 907 standards, this bit features a 135-degree split point that is self-centering and eliminates the need for a center punch on most surfaces. The straw finish indicates cobalt construction rated for harder materials. At 12 inches overall length with a 1-inch flute, it is sized for drilling into hard-to-reach areas where standard-length bits cannot reach. Licensed HVAC techs, machinists, and aerospace maintenance technicians commonly use this bit for deep-reach drilling tasks.

This bit is suited for drilling aluminum, stainless steel, titanium, and other hard alloys commonly found in aircraft structures and industrial fabrication. The extended 12-inch overall length makes it practical for drilling through panels, frames, and structural members where access is restricted. The straight cylindrical shank fits standard drill chucks, making it compatible with both hand-held and bench-mounted drilling equipment. It is a general-purpose cobalt bit appropriate for production and maintenance environments.

Key Features

• 135-degree split point is self-centering, reducing walking on hard or curved surfaces
• Cobalt tool material with straw finish for improved heat and wear resistance
• 12-inch overall length provides extended reach into confined or deep structures
• Spiral flute with tapered web and web-thinned geometry improves chip evacuation
• Right-hand cutting direction, 2 flutes, straight cylindrical shank
• Meets NAS 907 standard for aerospace drill bit performance

Compatibility

Designed as an OEM-style aircraft extension drill bit for use in standard drill chucks accepting a 0.0785-inch straight cylindrical shank, suitable for aerospace maintenance, sheet metal fabrication, and general industrial drilling applications.

Installation Notes

Installation and use should be performed by qualified machinists, aerospace mechanics, or maintenance technicians familiar with proper drilling procedures. Secure the workpiece firmly before drilling and ensure the drill chuck is properly tightened to the shank before operation. Use appropriate cutting fluid or lubricant when drilling hard alloys to extend bit life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.