Hertel C.E03.0675 Aircraft Extension Drill Bit 17/64 in Hss

Product Description

The HERTEL C.E03.0675 is an aircraft extension drill bit designed for drilling in hard-to-reach locations where a standard-length bit cannot access the workpoint. Built from high-speed steel with an oxide finish, it measures 17/64 inch (0.2656 inch) in diameter with a 6-inch overall length. The 135-degree split point is self-centering and reduces the need for a center punch on flat surfaces. The web-thinned, tapered web construction lowers thrust force and improves chip evacuation. This bit is suited for machinists, aircraft maintenance technicians, HVAC installers, and sheet metal workers who regularly drill through structural members, ductwork framing, or tight structural assemblies.

This drill bit is appropriate for general-purpose drilling in metal, sheet stock, and structural steel in both shop and field environments. The extended 6-inch overall length makes it particularly useful in aerospace maintenance, HVAC duct fabrication, electrical rough-in, and plumbing installations where standard drill bits cannot reach fastener locations inside framed walls, equipment cabinets, or airframe panels. Right-hand cutting direction is compatible with standard drill chucks and right-hand drill motors.

Key Features

• 17/64 inch (0.2656 inch) diameter with straight cylindrical shank for standard chuck compatibility
• 135-degree split point is self-centering and reduces walking on flat metal surfaces
• 6-inch overall length provides extended reach into confined or deep work areas
• 2-7/8 inch (2.875 inch) spiral flute length promotes efficient chip removal
• High-speed steel construction with oxide finish resists heat buildup during drilling
• Web-thinned tapered web reduces cutting resistance and improves feed rate

Compatibility

Designed as a general-purpose aircraft extension drill bit for use in standard right-hand drill motors and drill presses accepting a straight cylindrical shank in 17/64 inch diameter.

Installation Notes

Installation of this bit requires a drill motor or drill press with a compatible chuck size; verify chuck capacity before inserting the straight shank. Secure the workpiece firmly before drilling to prevent movement and bit deflection on extended-length bits. Use appropriate cutting fluid when drilling hardened steel or stainless to extend bit life and reduce heat. Inspect the cutting edges before each use and retire any bit showing visible chipping or discoloration from overheating.