Hertel C.E05.0470 Aircraft Extension Drill Bit 13 Hss

Product Description

The HERTEL C.E05.0470 is an aircraft extension drill bit designed for deep-reach drilling applications in aerospace, structural, and general-purpose metalworking. Built from high-speed steel with an oxide finish, this bit cuts wire gauge size 13 at 0.1850 inch decimal diameter. The 135-degree split point is self-centering and reduces walking on entry, eliminating the need for a center punch in most setups. At 12 inches overall length with a 2.3125-inch spiral flute, it reaches into tight cavities that standard-length bits cannot access. The right-hand cutting spiral and web-thinned, tapered web geometry reduce thrust and improve chip evacuation. This bit is sold individually and suits licensed A and P mechanics, aircraft sheet metal technicians, and general machinists.

This aircraft extension drill bit is used wherever extra reach is required — drilling through airframe structures, deep fastener holes, conduit backing plates, or confined mechanical assemblies. The 12-inch body allows access through panels, brackets, and stacked material where standard jobber-length bits fall short. General-purpose tool performance rating makes it suitable for mild steel, aluminum, and similar materials encountered in both aviation maintenance and industrial fabrication. It conforms to NAS 907 standards, which govern aircraft-grade drill geometry requirements.

Key Features

• Wire gauge size 13, 0.1850 inch cutting diameter with matching straight cylindrical shank
• 135-degree split point is self-centering — reduces bit walking on entry without a center punch
• 12-inch overall length provides deep-reach access in confined or stacked-material installations
• High-speed steel construction with oxide finish for corrosion resistance and heat management
• Web-thinned tapered web reduces cutting thrust and improves chip clearance
• Meets NAS 907 standards for aircraft drill geometry

Compatibility

Designed as an OEM-style aircraft extension drill bit conforming to NAS 907 standards, suitable for use in standard drill chucks accepting a 0.1850-inch straight cylindrical shank.

Installation Notes

Installation of this bit is performed by A and P mechanics, machinists, or qualified technicians using a hand drill, drill press, or pneumatic drill motor with a compatible chuck. Secure the workpiece before drilling and wear appropriate eye and hand protection per shop safety requirements. Inspect the cutting edges before each use — high-speed steel bits are susceptible to edge damage if dropped or improperly stored. Follow applicable aviation maintenance manual procedures and applicable regulatory guidance when drilling structural aircraft components.