Hertel C.E05.0437 Aircraft Extension Drill Bit 11/64 in

Product Description

The HERTEL C.E05.0437 is an aircraft extension drill bit designed for deep-reach drilling in metal fabrication, aerospace maintenance, and general industrial applications. Built from high-speed steel with an oxide finish, it measures 11/64 inch (0.1719 inch decimal) in diameter and delivers a full 12 inches of overall length for accessing tight or recessed bore locations. The 135-degree split point is self-centering, reducing the need for a center punch and minimizing walking on hard surfaces. With two right-hand spiral flutes and a web-thinned, tapered web configuration, the bit evacuates chips efficiently during extended cuts.

This drill bit is suited for sheet metal work, structural steel drilling, and maintenance tasks where standard-length bits cannot reach. The extended 12-inch overall length makes it a practical choice for aircraft maintenance technicians, millwrights, and fabricators working in confined airframes, deep enclosures, or stacked material assemblies. The straight cylindrical shank seats securely in standard drill chucks and right-angle drill attachments commonly used in tight-clearance environments.

Key Features

• 11/64 inch (0.1719 inch) diameter with matching straight cylindrical shank for consistent chuck grip
• 12-inch overall length provides extended reach for deep or obstructed bore locations
• 135-degree split point is self-centering and reduces drill walking on metal surfaces
• High-speed steel construction handles general-purpose metal drilling across a range of ferrous materials
• Oxide finish provides mild lubricity and surface protection during drilling operations
• 2-flute right-hand spiral with web-thinned tapered web for improved chip evacuation

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard drill chucks and right-angle drill attachments accepting a straight cylindrical 11/64 inch shank.

Installation Notes

This bit is installed and operated by machinists, aviation maintenance technicians, and fabricators using standard or right-angle electric drills. Secure the straight shank fully in the chuck before operation and verify chuck key is removed before powering the tool. Use appropriate cutting fluid on ferrous materials to extend bit life and reduce heat buildup. Inspect the cutting edges and point geometry before each use and retire the bit if chipping or excessive wear is observed.