Hertel C.E05.03569 Aircraft Extension Drill Bit 28 Hss

Product Description

The HERTEL C.E05.03569 is an aircraft extension drill bit designed for deep-reach drilling applications in aerospace and industrial environments. Built from high-speed steel with an oxide finish, this bit carries a wire gauge size of 28, equal to 0.1405 inches in decimal. The 135-degree split point promotes self-centering entry and reduces walking on hard or curved surfaces. At 12 inches in overall length, it reaches into deep cavities and structural assemblies that standard-length bits cannot access. The two-flute spiral design with a tapered web and web thinning supports efficient chip evacuation and reduced thrust requirements. Licensed HVAC techs, machinists, aircraft maintenance technicians, and industrial tradespeople are the primary installers.

This bit is suited for drilling in aerospace sheet metal, structural airframes, and fabricated assemblies where extended reach is required. The straight cylindrical shank accepts standard drill chucks. Right-hand cutting direction is standard for conventional drill press and hand-drill operation. The general-purpose tool performance rating and NAS 907 compliance make it appropriate for light-metal and composite drilling in both production and maintenance settings. The oxide finish provides basic corrosion resistance and heat reduction at the cutting surface.

Key Features

• Wire gauge size 28 (0.1405 inches decimal) with matching straight cylindrical shank diameter
• 135-degree split point for self-centering starts on hard or contoured surfaces
• 12-inch overall length for extended-reach drilling in deep structural assemblies
• High-speed steel construction with oxide finish for heat and wear resistance
• Two-flute spiral geometry with tapered web and web thinning for efficient chip removal
• Meets NAS 907 standards for aerospace tooling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 standards, suitable for use in standard drill chucks accepting a 0.1405-inch straight cylindrical shank.

Installation Notes

This bit is installed and operated by machinists, aircraft maintenance technicians, and trained industrial trades. Secure the shank fully in the drill chuck before operation and verify chuck key removal before engaging power. Use appropriate cutting fluid for the base material to extend tool life and maintain hole tolerance. Follow applicable workplace safety standards and wear rated eye protection during all drilling operations.