Hertel C.E05.1111 Aircraft Extension Drill Bit 7/16 in

Product Description

The HERTEL C.E05.1111 is an aircraft extension drill bit engineered for deep-reach drilling in metal and structural applications. Built from high-speed steel with an oxide finish, this bit features a 135-degree split point that self-centers on contact and eliminates the need for a center punch on most surfaces. The web-thinned, tapered web construction reduces thrust and improves chip evacuation. At 12 inches overall length and a 7/16-inch diameter, it gives technicians and machinists the reach needed to access fastener locations inside airframes, ductwork, sheet metal assemblies, and tight structural cavities. Right-hand spiral flutes with a 4.0625-inch flute length move chips up and out of the hole efficiently.

This aircraft extension bit is suited for maintenance, repair, and fabrication work where standard-length bits cannot reach. Common applications include structural steel, aluminum sheet, and composite panels in aviation, HVAC fabrication, plumbing rough-in, and general metalworking. The straight cylindrical shank fits standard drill chucks without adapters. Its general-purpose performance rating makes it appropriate for both production and field-service environments where bit reach is a limiting factor.

Key Features

• 135-degree split point self-centers on contact, reducing bit walk
• Web-thinned tapered web reduces drilling thrust and improves chip clearance
• 12-inch overall length provides extended reach into deep or obstructed work areas
• High-speed steel construction with oxide finish for corrosion resistance and reduced friction
• Right-hand spiral flutes with two-flute design for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without a sleeve or adapter

Compatibility

Designed as a general-purpose aircraft extension drill bit for use with standard drill chucks accepting a 7/16-inch straight cylindrical shank.

Installation Notes

Installation of this bit is performed by machinists, fabricators, HVAC sheet metal technicians, or maintenance mechanics using a standard keyed or keyless drill chuck. Secure the shank fully in the chuck before drilling and verify alignment to avoid bit deflection at extended length. Use appropriate cutting fluid for ferrous metals to extend bit life and maintain cut quality. Always wear eye protection and ensure the workpiece is firmly secured before beginning the drilling operation.