Hertel C.E05.0615 Aircraft Extension Drill Bit Letter C

Product Description

The HERTEL C.E05.0615 is a Letter C 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 measures 12 inches in overall length and features a 135-degree split point that is self-centering and reduces walking on entry. The spiral flute configuration with a tapered web and web-thinned geometry helps clear chips efficiently during extended drilling operations. Flute length is 2.75 inches. Weight is 0.15 pounds. This bit is suitable for general-purpose metal drilling and meets NAS 907 standards.

Aircraft extension bits like the C.E05.0615 are used in aerospace fabrication, structural steel work, automotive bodywork, and any application requiring access to recessed or hard-to-reach hole locations. The Letter C designation corresponds to a decimal diameter of 0.2420 inches. Right-hand cutting direction and a straight cylindrical shank make this bit compatible with standard drill chucks and pneumatic drilling equipment common in production and maintenance environments. Licensed trades and production floor machinists are the primary installers of this type of tooling.

Key Features

• Letter C drill size with 0.2420-inch decimal diameter for precise hole sizing
• 135-degree split point with self-centering tip reduces drill walking on entry
• 12-inch overall length provides extended reach into deep or obstructed work areas
• High-speed steel construction with oxide finish for durability in general-purpose metal drilling
• Web-thinned tapered web design promotes efficient chip evacuation during extended cuts
• Meets NAS 907 standard for aircraft-quality tooling

Compatibility

Designed as a general-purpose aircraft extension drill bit for use in standard drill chucks and pneumatic drilling equipment that accept a straight cylindrical shank of 0.2420 inches in diameter.

Installation Notes

This bit is installed and operated by machinists, aircraft maintenance technicians, and general metal fabricators using hand drills, drill presses, or pneumatic drilling equipment. Secure the straight cylindrical shank firmly in the chuck before operation and verify chuck key removal prior to starting. Use appropriate cutting fluid for the workpiece material to extend bit life and maintain hole quality. Inspect the cutting edges and web condition before each use and replace the bit if chipping or excessive wear is observed.