Hertel C.E03.0480 Aircraft Extension Drill Bit No.12 Hss

Product Description

The HERTEL C.E03.0480 is a No. 12 wire-size aircraft extension drill bit designed for drilling in tight or deep-reach applications where a standard-length bit cannot access the work area. Built from high-speed steel with an oxide finish, it measures 6 inches in overall length with a 2.3125-inch spiral flute. The 135-degree split point is self-centering and web-thinned, reducing the force needed to start a hole and minimizing walking on metal surfaces. This bit is suited for general-purpose drilling in metal, and it conforms to NAS 907 standards, making it appropriate for aerospace and structural fabrication work.

This aircraft extension bit is used in applications requiring extended reach, such as drilling through structural assemblies, sheet metal stacks, or confined airframe sections. The straight cylindrical shank accepts standard drill chucks on portable drills or drill presses. Right-hand cutting direction is standard for conventional drilling operations. Machinists, aircraft maintenance technicians, and metal fabricators working in production or repair environments will find this bit fits general-purpose drilling tasks where bit length is a constraint.

Key Features

• No. 12 wire size with 0.1890 inch decimal diameter for precise hole sizing
• 135-degree split point with web thinning for self-centering starts and reduced thrust
• 6-inch overall length for extended-reach drilling in tight or deep assemblies
• High-speed steel construction with oxide finish for wear resistance
• Spiral flute with tapered web configuration for efficient chip evacuation
• Meets NAS 907 standard for aerospace and structural drilling applications

Compatibility

Designed as an OEM-style replacement or standard fitment for applications requiring a No. 12 wire-size aircraft extension drill bit with a straight cylindrical shank, conforming to NAS 907 specifications.

Installation Notes

Installation and use of this drill bit should be performed by machinists, aircraft maintenance technicians, or qualified metalworkers familiar with drilling operations. Secure the straight cylindrical shank firmly in a properly sized drill chuck before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Follow applicable workplace safety standards and manufacturer guidelines for drill speed and feed rate based on material type.