Hertel 912 46 Aircraft Extension Drill Bit Wire 46 Hss

Product Description

The HERTEL 912 46 is a wire-gauge 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 features a 135-degree split point that self-centers on entry and reduces walking without a center punch. The bit carries a wire gauge size of 46, which corresponds to a decimal diameter of 0.0810 inches. At 12 inches overall length with a 1.125-inch spiral flute, it gives technicians and machinists the reach needed for airframe, structural, and general-purpose metal drilling tasks.

Aircraft extension drill bits in the wire-gauge range are most often installed by aviation maintenance technicians, millwrights, and metalworking professionals working on steel, aluminum, and similar metals where access is restricted. The 12-inch extended body allows drilling through panels, deep cavities, or stacked material where standard jobber-length bits are impractical. The right-hand cutting spiral flute clears chips efficiently during through-hole operations in light-gauge and medium-gauge metal stock.

Key Features

• Wire gauge size 46, decimal diameter 0.0810 inches for precise hole sizing
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• 12-inch overall length for extended reach in restricted-access drilling scenarios
• High-speed steel construction with oxide finish for general-purpose metal drilling
• Two-flute right-hand spiral design promotes consistent chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose replacement or add-to-kit aircraft extension drill bit for use with standard straight-shank drill chucks in portable drills, drill presses, and right-angle drill attachments used in metalworking and aviation maintenance applications.

Installation Notes

A licensed aircraft mechanic or qualified metalworker should verify hole tolerances against applicable engineering drawings before drilling. Secure the workpiece and ensure the drill press or portable drill is powered down and chuck key removed before bit installation. Use appropriate cutting fluid on steel stock to extend tool life and maintain hole quality. Dispose of chips per shop safety protocols and inspect the cutting edges before each use.