Hertel C.E07.0193 Aircraft Drill Bit 48 Cobalt 12 in

Product Description

The HERTEL C.E07.0193 is a cobalt aircraft extension drill bit engineered for deep-reach drilling in aerospace and industrial applications. Built to wire size 48 (0.0760 inches), it features a 135-degree split point that self-centers on entry and reduces walking on curved or coated surfaces. The straw finish indicates heat treatment and improves lubricity during high-speed drilling. At 12 inches overall length with a 1-inch spiral flute, this bit is designed for accessing fastener locations in confined or recessed areas where a standard-length bit cannot reach. Licensed shops and MRO technicians are the primary users.

This drill bit is suited for aircraft structural work, sheet metal fabrication, and general industrial drilling where extended reach and precision entry are required. The cobalt construction handles harder alloys including stainless steel and high-strength aluminum. Right-hand cutting direction and a straight cylindrical shank make it compatible with standard drill chucks and air-powered drill motors commonly used in aerospace production and maintenance environments. It meets NAS 907 standards.

Key Features

• Wire size 48 diameter (0.0760 inches) for precision fastener hole sizing
• 135-degree split point with self-centering geometry reduces walking and pilot hole requirements
• Cobalt tool material provides heat and wear resistance in hard alloy drilling
• 12-inch overall length delivers extended reach into confined or recessed areas
• Web-thinned tapered web configuration reduces thrust force and improves chip evacuation
• Meets NAS 907 standard for aircraft extension drill bits

Compatibility

Designed as an OEM-style aircraft extension drill bit suitable for use with standard straight-shank drill chucks and right-angle air drill motors in aerospace MRO, sheet metal, and general industrial drilling applications.

Installation Notes

This bit is intended for use by qualified aircraft maintenance technicians and trained machinists. Secure the straight cylindrical shank firmly in the drill chuck before use and verify runout before drilling into primary structure. Always match feed rate and RPM to the material being drilled - cobalt bits used at incorrect speeds in soft materials can wear prematurely. Inspect the split point for chipping or wear before each use and replace if the cutting edges show deformation.