Hertel C.E05.0178 Aircraft Extension Drill Bit No. 50

Product Description

The HERTEL C.E05.0178 is a No. 50 aircraft extension drill bit engineered for precision drilling in tight or deep-reach applications. Built from high-speed steel with an oxide finish, it features a 135-degree split point that self-centers on contact and reduces walking without a center punch. The overall length of 12 inches provides the extended reach required in aerospace, HVAC, and structural fabrication work. With a 0.0700 inch diameter and a 1-inch spiral flute, this bit removes chips efficiently while maintaining cutting stability. Licensed technicians and fabricators working to NAS 907 standards will find this bit suited to general-purpose production drilling.

This bit is designed for use in aircraft assembly, sheet metal work, HVAC ductwork fabrication, and any application requiring extended reach in confined spaces. The straight cylindrical shank accepts standard drill chucks without adapters. Right-hand cutting direction and a two-flute spiral configuration make it compatible with most handheld and bench-mounted drilling equipment. Its web-thinned, tapered web design reduces thrust force, which is especially useful when drilling aluminum, mild steel, and similar materials at production volumes.

Key Features

• No. 50 wire gauge size — 0.0700 inch diameter for precision small-hole drilling
• 12-inch overall length delivers extended reach into deep or confined workspaces
• 135-degree split point with self-centering geometry eliminates center-punch requirement
• High-speed steel construction with oxide finish for corrosion resistance and reduced friction
• Web-thinned tapered web reduces drilling thrust and extends bit life
• Meets NAS 907 standard for aerospace and structural drilling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks; suitable for use in aerospace assembly, HVAC fabrication, and structural metalwork applications requiring a No. 50 wire gauge diameter.

Installation Notes

This bit is installed and operated by machinists, fabricators, HVAC technicians, and aerospace maintenance professionals. Secure the straight cylindrical shank firmly in a keyed or keyless drill chuck before use, and verify the chuck is fully tightened to prevent slippage. Ensure the workpiece is clamped securely to prevent movement during drilling. Follow applicable shop safety procedures and applicable standards such as NAS 907 when working on structural or aerospace components.