Hertel C.E07.1151 Aircraft Extension Drill Bit 29/64 in

Product Description

The HERTEL C.E07.1151 is a cobalt aircraft extension drill bit engineered for demanding drilling applications in aerospace, automotive, and metalworking environments. It measures 29/64 inch (0.4531 inch decimal) in diameter with a 12-inch overall length, providing the extended reach required for deep-hole and hard-to-access work. The 135-degree split point promotes self-centering on entry, reducing walking and the need for a center-punch. A straw finish indicates heat treatment appropriate for cobalt-grade tooling. This bit is installed by machinists, aircraft maintenance technicians, and metal fabricators who need consistent performance in hard alloys and stainless steels.

This bit is suited for drilling through aluminum, steel, stainless steel, and other hard metals in both production and maintenance settings. Its extended 12-inch overall length makes it particularly useful in confined areas or deep-cavity applications common in aircraft maintenance and structural fabrication work. The straight cylindrical shank fits standard drill chucks without adapters. It meets NAS 907 standards, making it appropriate for aerospace-rated applications.

Key Features

• 135-degree split point with self-centering geometry reduces walking on hard metal surfaces
• Cobalt tool material provides heat and wear resistance for drilling tough alloys
• 12-inch overall length gives extended reach for deep-hole and obstructed-access applications
• Spiral flute design with web-thinned tapered web improves chip evacuation and reduces thrust
• Right-hand cutting direction with 2 flutes for standard drill chuck compatibility
• Meets NAS 907 standard for aerospace-grade drill bit performance

Compatibility

Designed as a general-purpose aircraft extension drill bit compatible with standard straight-cylindrical-shank drill chucks used in hand drills, drill presses, and CNC equipment across aerospace, automotive, and metal fabrication applications.

Installation Notes

This drill bit is typically used by machinists, aircraft maintenance technicians, and metal fabricators. Secure the straight cylindrical shank firmly in the drill chuck before operation and verify runout before beginning a cut. Always wear appropriate eye protection and use suitable cutting fluid when drilling hard alloys to extend tool life and manage heat buildup. Follow applicable workplace safety standards and equipment manufacturer guidelines for drill speed and feed rate selection.