Hertel C.E03.0264 Aircraft Extension Drill Bit No. 37

Product Description

The HERTEL C.E03.0264 is a No. 37 aircraft extension drill bit engineered for drilling in aerospace and industrial applications where standard-length bits cannot reach. Built from high-speed steel with an oxide finish, this bit measures 6 inches in overall length with a 1.4375-inch spiral flute. The 135-degree split point is self-centering, reducing the need for a center punch and minimizing walking on entry. A web-thinned, tapered web configuration reduces cutting resistance and improves chip evacuation. The straight cylindrical shank accepts standard chucks. Installed by machinists, aircraft mechanics, and metalworking professionals.

This aircraft extension drill bit is suited for through-hole and blind-hole drilling in metal, composite, and structural materials where additional reach is required. The extended 6-inch body allows access to recessed or obstructed drilling locations common in airframe assembly, fabrication jigs, and structural metalwork. Its general-purpose performance rating makes it appropriate for both production environments and field repair applications. The right-hand cutting direction and two-flute spiral geometry are standard for these drilling tasks.

Key Features

• No. 37 wire gauge size, 0.1040-inch decimal diameter
• 135-degree split point with self-centering geometry reduces walking on entry
• Web-thinned tapered web lowers cutting force and improves chip flow
• High-speed steel construction with oxide finish for general-purpose metal drilling
• 6-inch overall length provides extended reach into recessed or obstructed work areas
• Meets NAS 907 standard for aircraft extension drill bits

Compatibility

Designed as an OEM-style replacement and general-purpose aircraft extension drill bit suitable for use in standard straight-shank drill chucks in hand drills, drill presses, and right-angle drill attachments used in aerospace and metalworking applications.

Installation Notes

This bit is installed and operated by qualified machinists or aircraft maintenance technicians. Secure the straight cylindrical shank fully in a compatible drill chuck before use. Verify spindle speed is appropriate for the workpiece material and bit diameter before starting the cut. Inspect the cutting edges and point for wear or damage before each use and replace the bit if chipping or dulling is observed.