Eagle Cutting Tool AC712-016-I Cobalt Aircraft Drill

Product Description

The EAGLE CUTTING TOOL AC712-016-I is a cobalt aircraft-extension drill bit designed for deep-reach drilling in tight or hard-to-access locations. Built from cobalt high-speed steel, this bit handles tough materials including stainless steel, hardened alloys, and other difficult-to-machine metals. It measures 1/4 inch in diameter with a 12-inch overall length (OAL), providing the extended reach required for aircraft maintenance, structural fabrication, and similar precision drilling tasks. Machinists, aviation maintenance technicians, and metal fabricators rely on cobalt-grade tooling like this for consistent performance at elevated cutting temperatures.

This drill bit is suited for applications where standard-length bits cannot reach the work surface. Common uses include drilling through deep structural members, engine bays, fuselage panels, and similar confined or deep-access metalworking scenarios. The cobalt alloy construction maintains cutting edge integrity longer than standard high-speed steel under high-heat conditions, making it a practical choice for production drilling as well as one-off repair work in aerospace and industrial maintenance environments.

Key Features

• 1/4 inch cutting diameter for standard fastener and rivet hole applications
• 12 inch overall length provides extended reach into deep or obstructed work areas
• Cobalt high-speed steel construction resists heat buildup and edge wear on hard materials
• Aircraft-style extension geometry designed for deep-hole drilling accuracy
• Minimum order quantity of 1 unit for flexible purchasing

Compatibility

Designed as an OEM-style replacement or direct-use drill bit compatible with standard 1/4 inch drill chucks and collet systems used in hand drills, drill presses, and pneumatic drilling equipment.

Installation Notes

Secure the bit firmly in a properly sized chuck before use and verify the shank is fully seated. Always wear appropriate eye and hand protection when drilling metal. Use cutting fluid or coolant when drilling stainless steel or hardened alloys to extend tool life and improve hole quality. Follow applicable workplace safety and aviation maintenance manual procedures when working on certified aircraft structures.

Technical Specifications

• Cutting Diameter: 0.25 inches (1/4 inch)
• Overall Length (OAL): 12 inches
• Material: Cobalt High-Speed Steel
• Weight: 0.24 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: AC712-016-I