Hertel C.E05.0873 Aircraft Extension Drill Bit 11/32 in

Product Description

The HERTEL C.E05.0873 is an aircraft extension drill bit designed for reaching deep into workpieces where a standard-length bit cannot access. Built from high-speed steel with an oxide finish, this bit measures 11/32 inch (0.3438 inch) in diameter and runs 12 inches overall. The 135-degree split point is self-centering and reduces the need for a center punch, allowing the bit to walk less on contact with the workpiece. It is a general-purpose tool suited for machinists, fabricators, and maintenance technicians working on aircraft structures, HVAC sheet metal, electrical enclosures, and other deep-reach drilling applications.

This drill bit is configured with a straight cylindrical shank, two spiral flutes, and a right-hand cutting direction. The flute length measures 3-7/16 inches (3.4375 inches), providing adequate chip evacuation during extended drilling operations. Web thinning with a tapered web configuration reduces thrust and improves cutting efficiency. The oxide finish provides a degree of lubricity and surface protection during service. It is appropriate for use in hand-held drill motors, drill presses, and magnetic drills where a 12-inch extension reach is required.

Key Features

• 135-degree split point is self-centering, minimizing walking on entry
• 12-inch overall length provides extended reach for deep or obstructed drilling locations
• High-speed steel construction handles general-purpose drilling in steel, aluminum, and similar materials
• Web-thinned, tapered web reduces required thrust and improves cutting performance
• Oxide finish adds surface protection and light lubricity
• Two spiral flutes with right-hand cut for standard drill motor compatibility

Compatibility

Designed as a general-purpose aircraft extension drill bit with a straight cylindrical shank sized at 11/32 inch, compatible with standard drill chucks that accept that shank diameter.

Installation Notes

Aircraft extension drill bits should be installed by machinists or qualified technicians familiar with rotary cutting tools and applicable shop safety standards. Ensure the chuck is fully tightened and the shank is seated squarely before operation. Use appropriate cutting fluid for the material being drilled to extend tool life and reduce heat buildup. Secure the workpiece firmly before drilling to prevent movement during the cut.