Hertel C.E03.1049 Aircraft Drill Bit Letter Z 135

Product Description

The HERTEL C.E03.1049 is an aircraft extension drill bit designed for deep-reach drilling applications in metalworking and aerospace maintenance environments. Built from high-speed steel with an oxide finish, this bit carries a Letter Z designation, corresponding to a decimal diameter of 0.4130 inches. The 135-degree split point is self-centering and web-thinned, reducing walking on entry and lowering the thrust force needed to start and maintain the cut. The extended overall length of 6 inches and a spiral flute length of 3.875 inches make it suited for drilling into recessed or hard-to-access areas where standard-length bits cannot reach. Right-hand cutting direction and a straight cylindrical shank are standard across this configuration.

This drill bit is intended for use by machinists, aircraft maintenance technicians, and metal fabrication professionals working in both production and MRO environments. The general-purpose tool performance rating makes it appropriate for a range of ferrous and non-ferrous metals under normal shop or field conditions. Its two-flute spiral configuration promotes efficient chip evacuation during extended-depth drilling passes. The NAS 907 standard compliance indicates suitability for aerospace-grade drilling applications where dimensional and performance tolerances are tightly controlled.

Key Features

• Letter Z size, 0.4130 inches decimal diameter for precise hole sizing
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• High-speed steel construction with oxide finish for wear resistance
• Extended 6-inch overall length for deep-reach access in confined areas
• Spiral flute length of 3.875 inches promotes consistent chip evacuation
• Meets NAS 907 standard for aerospace drilling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard straight-shank drill chucks used in hand drills, drill presses, and right-angle drill attachments common in aviation maintenance and metal fabrication.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or certified aircraft maintenance technicians familiar with metal drilling procedures. Secure the straight cylindrical shank firmly in a compatible drill chuck before use, and verify that the chuck is rated for the shank diameter of 0.4130 inches. Always wear appropriate eye and hand protection, and ensure the workpiece is properly clamped or fixtured before drilling. Follow applicable workplace safety standards and, for aircraft applications, adhere to the relevant FAA-approved maintenance manual procedures.