Eagle Cutting Tool AC712-020-I Cobalt Aircraft Drill

Product Description

The EAGLE CUTTING TOOL AC712-020-I is a cobalt aircraft extension drill designed for deep-reach drilling applications in aerospace, automotive, and general metalworking. Built from high-speed cobalt steel, this drill delivers the heat resistance and edge retention required when boring through hard metals and alloys. The 5/16-inch diameter and 12-inch overall length make it well-suited for reaching into confined spaces or through thick structural materials where standard-length drills fall short. It is used by machinists, aircraft maintenance technicians, and fabricators who need reliable performance in demanding drilling conditions.

This drill is intended for use on metal substrates including aluminum, steel, stainless steel, and titanium alloys commonly encountered in aircraft structures and heavy fabrication. The extended 12-inch overall length accommodates drilling through deep sections or at angles that standard jobber-length drills cannot reach. It is a practical choice for MRO shops, aircraft maintenance facilities, and fabrication operations requiring consistent hole geometry in hard or abrasive materials.

Key Features

• 5/16-inch diameter for precise, consistent hole sizing
• 12-inch overall length provides extended reach into deep or confined work areas
• Cobalt steel construction resists heat buildup during high-speed or heavy-feed drilling
• Suitable for hard metals including stainless steel, titanium alloys, and hardened aluminum
• Aircraft-style geometry supports clean entry and reduced walking on curved or irregular surfaces

Compatibility

Designed as an OEM-style replacement or direct-use aircraft extension drill compatible with standard 3/8-inch or 1/2-inch keyed and keyless drill chucks accepting 5/16-inch round shanks.

Installation Notes

Secure the drill firmly in a compatible chuck before use and verify shank seating to prevent slippage under load. Use appropriate cutting fluid or coolant when drilling stainless steel, titanium, or other work-hardening alloys to extend tool life and maintain hole quality. Always wear appropriate eye protection and secure workpieces before drilling. Disposal of metal chips and worn tooling should follow applicable shop safety procedures.

Technical Specifications

• Diameter: 5/16 inches
• Overall Length (OAL): 12 inches
• Weight: 0.24 pounds
• Material: Cobalt high-speed steel
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: AC712-020-I