Hertel C.E03.0605 Aircraft Drill Bit Letter B Hss

Product Description

The HERTEL C.E03.0605 is an aircraft extension drill bit sized at Letter B (0.2380 inches decimal equivalent) and built for reaching into confined or deep work areas where a standard-length bit cannot access. Manufactured from high-speed steel with an oxide finish, it features a 135-degree split point that is self-centering and web-thinned to reduce walking and lower thrust requirements at entry. The 6-inch overall length combined with a 2.75-inch spiral flute gives technicians the reach needed for aircraft structural work, HVAC sheet metal, and similar precision drilling applications. It carries a straight cylindrical shank and cuts in the right-hand direction. Installation is handled by machinists, aircraft maintenance technicians, and sheet metal tradespeople.

This drill bit is built for general-purpose drilling in metal substrates where extended reach is required. The tapered web configuration helps maintain rigidity along the extended body while the two-flute spiral design evacuates chips efficiently. Common applications include airframe structural drilling, access-hole drilling in HVAC ductwork and equipment panels, and any fabrication or maintenance task requiring a longer-than-standard bit in Letter B diameter. The oxide finish provides a modest level of lubricity and corrosion resistance suited to shop and field environments.

Key Features

• Letter B size — 0.2380 inches decimal equivalent for precise hole sizing
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• 6-inch overall length for extended reach into confined spaces
• High-speed steel construction for durability across a range of metal substrates
• Oxide finish for added lubricity and light corrosion resistance
• Two-flute spiral design promotes efficient chip evacuation
• Meets NAS 907 standard

Compatibility

Designed as a general-purpose aircraft extension drill bit in Letter B diameter for use in standard 3-jaw drill chucks and right-angle drill motors accepting a 0.2380-inch straight cylindrical shank.

Installation Notes

This bit is installed and operated by machinists, aircraft maintenance technicians, and sheet metal workers using a drill press, hand drill, or right-angle drill motor. Secure the straight shank firmly in the chuck before operation and verify the workpiece is clamped to prevent movement. Use appropriate cutting fluid for the material being drilled to extend tool life and improve hole finish. Follow applicable workplace safety standards and any facility-specific protocols for drilling operations.