Hertel C.E06.0199 Aircraft Extension Drill Bit 47

Product Description

The HERTEL C.E06.0199 is a cobalt aircraft extension drill bit designed for precision drilling in hard materials and tight-access applications. Built to wire size 47 (0.0785 inches decimal), it features a 135-degree split point that promotes self-centering on contact, reducing walking and the need for a center punch. The straw finish indicates a heat-treated cobalt construction suited for cutting ferrous metals, stainless steel, and high-strength alloys. The two-flute spiral configuration handles chip evacuation efficiently across the 1-inch flute length and 6-inch overall length. Licensed trades and aerospace MRO shops rely on this bit where standard-length drills cannot reach.

This bit is built for aircraft structural work, sheet metal fabrication, and general metalworking applications where extended reach is required. The straight cylindrical shank fits standard drill chucks without modification. The web-thinned, tapered web configuration reduces thrust force at the cutting edge, making it practical for hand-held pneumatic drills and drill presses alike. It is appropriate for both production drilling environments and field repair scenarios where access depth is the limiting factor.

Key Features

• Wire size 47 diameter: 0.0785 inches, straight cylindrical shank
• 135-degree split point with self-centering tip reduces pilot hole requirement
• Cobalt tool material with straw finish for heat resistance and durability in hard metals
• Web-thinned tapered web reduces drilling thrust and extends bit life
• Right-hand spiral flute with two flutes for efficient chip clearance
• Meets NAS 907 standard for aircraft-grade tooling

Compatibility

Designed as a general-purpose aircraft extension drill bit suitable for use in standard drill chucks accepting a 0.0785-inch straight cylindrical shank across hand-held and bench-mounted drilling equipment.

Installation Notes

This bit is typically installed and operated by machinists, sheet metal workers, and aviation maintenance technicians using pneumatic or electric drill equipment. Ensure the drill chuck is fully secured around the straight shank before operation. Wear appropriate eye protection and secure the workpiece firmly to prevent movement during drilling. Follow applicable shop safety standards and manufacturer speed recommendations for cobalt tooling in the target material.