Hertel C.E04.0107 Aircraft Extension Drill Bit Size 58

Product Description

The HERTEL C.E04.0107 is an aircraft extension drill bit designed for deep-reach drilling applications where a standard-length bit cannot access the work area. Built from high-speed steel with an oxide finish, it carries a 135-degree split point and measures 12 inches in overall length. The extended reach and 2-flute spiral design allow controlled chip evacuation during drilling into metal and composite materials. The web-thinned, tapered web construction reduces thrust force at entry. This bit is sized at wire gauge 58, which equals 0.0420 inches in decimal, making it suitable for precision small-diameter hole work in aerospace and structural fabrication environments.

Aircraft extension drill bits like the C.E04.0107 are used in aviation maintenance, aerospace assembly, and structural metalwork where fastener holes must be drilled through deep cavities, layered assemblies, or obstructed access points. The 12-inch overall length allows technicians to reach through structural members and tight airframe locations that standard jobber-length bits cannot reach. General-purpose tool performance makes it applicable across aluminum, mild steel, and similar materials encountered in aviation and industrial fabrication.

Key Features

• Wire gauge size 58 (0.0420 inches decimal) for precision small-diameter drilling
• 135-degree standard point angle with web thinning for reduced entry thrust
• 12-inch overall length for extended-reach and deep-cavity access
• High-speed steel construction with oxide finish for general-purpose metal cutting
• 2-flute right-hand spiral design promotes chip evacuation during drilling
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 standards, suitable for use in aerospace maintenance, structural assembly, and industrial metalworking applications requiring extended-reach, small-diameter drilling.

Installation Notes

Installation of aircraft extension drill bits should be performed by qualified aviation maintenance technicians or metalworkers familiar with applicable aerospace and fabrication standards. Secure the straight shank firmly in a drill chuck before operation and confirm bit alignment before applying feed pressure. Work to applicable NAS or shop process specifications for hole tolerances and surface finish requirements. Avoid side-loading the extended shank, as lateral force can cause deflection or bit breakage on small-diameter tools.