Hertel C.E07.0185 Aircraft Extension Drill Bit 49

Product Description

The HERTEL C.E07.0185 is a cobalt aircraft extension drill bit engineered for drilling in tight or deep-reach applications where a standard-length bit cannot access the workpoint. Built to a 135-degree split point with a self-centering tip and web-thinned, tapered web construction, it starts on contact without a center punch and reduces walking on curved or irregular surfaces. The 12-inch overall length gives technicians the reach needed in aerospace, structural, and sheet-metal work. The straw finish provides mild heat and wear resistance. The straight cylindrical shank fits standard drill chucks without adapters. Licensed contractors and aerospace maintenance professionals are the primary installers of this tool.

This bit is sized to wire gauge 49, equivalent to 0.0730 inches decimal diameter, and is suited for applications requiring consistent, repeatable hole sizing in metals including aluminum, stainless steel, and high-strength alloys. The 1-inch spiral flute length handles chip evacuation efficiently in the materials typical to aircraft skin, structural members, and general fabrication setups. The two-flute right-hand cutting geometry works with standard right-hand drill motors and pneumatic air drills commonly used in aviation maintenance and sheet-metal shops.

Key Features

• Cobalt construction for heat resistance and durability in hard metals
• 135-degree split point with self-centering tip reduces bit walking and eliminates need for a center punch
• 12-inch overall length provides extended reach for deep or obstructed drilling locations
• Web-thinned tapered web lowers thrust requirements and improves chip flow
• Straw finish adds mild surface protection against heat and wear
• Meets NAS 907 standards for aircraft extension drill bits

Compatibility

Designed as an OEM-style aircraft extension drill bit for use in aerospace maintenance, structural fabrication, and sheet-metal applications requiring wire-gauge sizing to number 49 (0.0730 inches) with extended reach.

Installation Notes

Installation and use of this bit is performed by aerospace maintenance technicians, machinists, and sheet-metal fabricators. Secure the straight cylindrical shank firmly in a compatible drill chuck rated for the shank diameter before operation. Verify drill motor rotation direction is right-hand before engaging the bit. Use appropriate cutting fluid or lubricant for the base material to extend bit life and maintain hole quality.