Hertel C.E05.0794 Aircraft Extension Drill Bit 5/16 in Hss

Product Description

The HERTEL C.E05.0794 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 measures 12 inches in overall length with a 3.1875-inch spiral flute. The 135-degree split point is self-centering and web-thinned, reducing walking on entry and lowering thrust requirements on hard materials. The straight cylindrical shank measures 5/16 inch in diameter, fitting standard drill chucks without an adapter. This bit is suited for machinists, aircraft maintenance technicians, sheet metal workers, and general-purpose trade drilling tasks.

Aircraft extension drill bits are used when drilling through structural members, deep cavities, or stacked assemblies where bit reach is a limiting factor. The 12-inch overall length makes this bit appropriate for accessing tight or recessed locations in fabrication, maintenance, and repair work across aerospace, HVAC sheet metal, electrical conduit work, and general mechanical trades. The right-hand cutting direction and two-flute spiral design promote efficient chip evacuation during through-hole drilling in steel, aluminum, and similar materials.

Key Features

• 135-degree split point is self-centering and reduces drill walking on entry
• Web-thinned, tapered web configuration lowers cutting thrust and improves penetration efficiency
• 12-inch overall length provides extended reach for deep or obstructed drilling locations
• High-speed steel construction with oxide finish for corrosion resistance and general-purpose durability
• Two-flute spiral design promotes chip evacuation during through-hole drilling
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard drill chucks and right-hand drilling equipment accepting a 5/16-inch straight cylindrical shank.

Installation Notes

This bit is installed and operated by machinists, sheet metal workers, aircraft maintenance technicians, and trade professionals using standard corded or pneumatic drills. Secure the straight shank fully in the chuck before operation and verify chuck key is removed before starting the drill. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and manage heat. Follow applicable workplace safety standards and wear appropriate eye protection during all drilling operations.