Hertel C.E05.0594 Aircraft Extension Drill Bit Letter a

Product Description

The HERTEL C.E05.0594 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, this bit features a 135-degree split point that is self-centering and web-thinned for faster penetration and reduced walking on entry. The straight cylindrical shank measures 0.2340 inches in diameter, matching the Letter A drill size. At 12 inches in overall length with a 2.625-inch spiral flute, it is well suited for aerospace fabrication, structural assembly, and maintenance drilling through metal substrates. Right-hand cutting direction and a tapered web configuration round out the general-purpose performance profile.

Aircraft extension drill bits like the C.E05.0594 are used in aerospace and aviation maintenance, aircraft assembly, and heavy industrial metalworking where clearance is limited or access depth exceeds the reach of a standard jobber-length bit. The extended 12-inch body allows technicians to drill through structural members, fuselage sections, and similar assemblies without repositioning fixtures. This bit meets NAS 907 standards, making it appropriate for regulated aerospace and defense fabrication environments. It is typically used by aerospace maintenance technicians, sheet metal mechanics, and industrial machinists working on ferrous and non-ferrous metals.

Key Features

• Letter A size (0.2340 inches decimal equivalent) straight cylindrical shank
• 135-degree split point is self-centering and reduces drill walking on entry
• Web-thinned tapered web design reduces thrust force and improves chip evacuation
• 12-inch overall length provides extended reach for deep or restricted-access drilling
• High-speed steel construction with oxide finish for general-purpose metal drilling
• Meets NAS 907 standard for aerospace and defense applications

Compatibility

Designed as an OEM-style general-purpose aircraft extension drill bit suitable for use in standard drill chucks and pneumatic drill motors that accept a 0.2340-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists, aerospace mechanics, or sheet metal technicians familiar with drill press or pneumatic drill operation. Secure the workpiece firmly before drilling to prevent movement. Ensure the drill chuck is tightened to the manufacturer specification for the tool being used. Operate at appropriate cutting speeds for the material and bit diameter to avoid overheating the high-speed steel cutting edges.