Hertel C.E05.0278 Aircraft Drill Bit 7/64 Inch Hss

Product Description

The HERTEL C.E05.0278 is a 7/64 inch (0.1094 inch decimal) aircraft extension drill bit designed for deep-reach drilling applications where a standard-length bit cannot access the work surface. Built from high-speed steel with an oxide finish, it features a 135-degree split point that is self-centering and reduces walking on entry without a center punch. The spiral flute geometry and web-thinned, tapered web construction promote chip evacuation and reduce thrust during drilling. Right-hand cutting direction. Overall length is 12 inches with a 1.5-inch flute length, giving this bit its extended reach characteristic.

Aircraft extension drill bits are used in aerospace maintenance, sheet metal fabrication, HVAC ductwork installation, electrical rough-in, and general mechanical work where fastener holes must be drilled in confined or deep cavities. The 7/64 inch diameter is a common size for pilot holes, rivet holes, and small fastener clearance holes in metal, plastic, and composite substrates. General-purpose tool performance rating makes it suitable for production and maintenance environments alike.

Key Features

• 135-degree split point is self-centering and reduces drill walk on entry
• 12-inch overall length provides extended reach into deep or confined spaces
• High-speed steel construction with oxide finish for wear resistance
• Web-thinned, tapered web reduces cutting thrust and improves chip flow
• 2-flute spiral design with 1.5-inch flute length for effective chip evacuation
• Straight cylindrical shank compatible with standard drill chucks

Compatibility

Designed for use in standard drill chucks accepting a straight cylindrical shank at 7/64 inch (0.1094 inch) diameter. Suitable for handheld drills, drill presses, and right-angle drill attachments used in sheet metal, aerospace, HVAC, and general mechanical applications.

Installation Notes

This bit is installed and removed by a licensed mechanic, sheet metal worker, or electrician using a standard keyed or keyless chuck. Secure the workpiece before drilling and use appropriate cutting fluid when drilling ferrous metals to extend tool life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows signs of damage. Follow shop safety protocols including eye protection whenever operating rotary cutting tools.