Hertel C.E05.0422 Aircraft Extension Drill Bit No. 19

Product Description

The HERTEL C.E05.0422 is an 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 carries a No. 19 wire gauge size (0.1660 inches decimal) and measures 12 inches in overall length. The 135-degree split point is self-centering and web-thinned, which reduces thrust during entry and minimizes walking on hard or curved surfaces. Two spiral flutes with a 2.125-inch flute length clear chips efficiently during drilling. This bit is installed by machinists, aircraft maintenance technicians, and sheet metal workers requiring extended reach without sacrificing hole accuracy.

This extension drill bit is suited for aerospace, automotive, and general fabrication work where standard-depth bits fall short. The straight cylindrical shank seats securely in drill chucks and right-angle drill attachments commonly used in tight aircraft airframe bays and structural assemblies. The general-purpose tool performance rating makes it appropriate for use on aluminum, mild steel, and similar materials encountered in production and repair environments. Right-hand cutting direction is standard for use with conventional drill presses, cordless drills, and pneumatic drill motors.

Key Features

• No. 19 wire gauge size at 0.1660 inches decimal diameter for precise hole sizing
• 12-inch overall length provides extended reach into deep or restricted work areas
• 135-degree split point is self-centering and reduces bit walking on entry
• Web-thinned, tapered web configuration lowers drilling thrust and improves chip evacuation
• High-speed steel construction with oxide finish for wear resistance in general-purpose applications
• Meets NAS 907 standard for aircraft-quality drill bit performance

Compatibility

Designed as a general-purpose aircraft extension drill bit with a straight cylindrical shank compatible with standard drill chucks and right-angle drill motor attachments used in aerospace and fabrication applications.

Installation Notes

This bit is typically installed by machinists and aircraft maintenance technicians using drill presses, pneumatic drill motors, or cordless drills. Secure the straight shank fully in the chuck before use to prevent runout. Use appropriate cutting fluid for ferrous materials to extend tool life. Follow applicable shop safety procedures and relevant NAS or OEM maintenance manual requirements when drilling structural components.