Hertel C.E07.0873 Aircraft Extension Drill Bit 11/32 in Cobalt

Product Description

The HERTEL C.E07.0873 is a cobalt aircraft extension drill bit designed for drilling in tight-access and deep-reach applications where a standard-length bit cannot reach. Built from cobalt tool steel with a straw finish, this bit measures 11/32 inch (0.3438 inch) in diameter and carries a 135-degree split point for self-centering starts without a center punch. The 12-inch overall length and 3-7/16-inch spiral flute give machinists and aerospace maintenance technicians the reach and chip clearance needed for structural drilling tasks.

This bit suits general-purpose drilling in aerospace, sheet metal, and MRO applications where extended reach into confined airframe or structural assemblies is required. The straight cylindrical shank seats securely in standard drill chucks. Its two-flute spiral design and right-hand cutting direction make it compatible with conventional handheld and machine-mounted drilling equipment used in aircraft maintenance and fabrication environments.

Key Features

• Cobalt tool steel construction for heat resistance during extended drilling cycles
• 135-degree split point with self-centering geometry reduces walking on hard surfaces
• 12-inch overall length provides extended reach into confined or deep-access locations
• Web-thinned, tapered web configuration reduces thrust and improves chip evacuation
• Straw finish indicates heat treatment and provides mild lubricity
• Meets NAS 907 standard for aircraft extension drill bits

Compatibility

Designed as an OEM-style replacement or direct-fit aircraft extension drill bit for general-purpose drilling applications meeting NAS 907 requirements.

Installation Notes

Installation of this bit should be performed by qualified machinists or aircraft maintenance technicians following applicable shop and airworthiness procedures. Secure the straight cylindrical shank fully into the drill chuck before operation and verify runout before drilling. Power down and de-energize all associated equipment before changing bits. Do not exceed the recommended feed and speed parameters for the material being drilled to avoid premature wear or breakage.