Eagle Cutting Tool AC712-027-I Cobalt Aircraft Drill 27/64 in

Product Description

The EAGLE CUTTING TOOL AC712-027-I is a cobalt aircraft extension drill bit designed for drilling through tough materials in hard-to-reach applications. With a 27/64-inch diameter and a 12-inch overall length (OAL), this bit provides the extended reach required for deep-hole drilling in sheet metal, structural components, and airframe assemblies. The cobalt construction gives it superior heat and wear resistance compared to standard high-speed steel, making it well suited for stainless steel, high-nickel alloys, and other difficult-to-machine materials. HVAC sheet metal fabricators, aircraft maintenance technicians, and industrial tradespeople are the primary users of this style of bit.

This drill bit is used in applications where standard-length bits cannot access the work area. Common scenarios include drilling through deep structural panels, HVAC ductwork flanges, and multi-layer sheet metal assemblies. The 12-inch OAL allows the operator to drill through thick or layered stock while maintaining control and concentricity. It is compatible with standard drill chucks and right-angle drill attachments commonly used in HVAC, aviation, and sheet metal trades.

Key Features

• 27/64-inch diameter for precise, consistent hole sizing in metal fabrication
• 12-inch overall length provides extended reach for deep or obstructed drilling locations
• Cobalt construction offers enhanced heat resistance and longer tool life versus standard HSS bits
• Compatible with standard keyed and keyless drill chucks
• Minimum order quantity of 1 unit

Compatibility

Designed as an OEM-style replacement and standard fitment for use with portable electric drills, right-angle drills, and drill presses equipped with standard chucks accepting 27/64-inch shank tooling.

Installation Notes

This bit is installed and used by HVAC technicians, sheet metal workers, and maintenance tradespeople. Always secure the workpiece before drilling and use appropriate cutting fluid when drilling through stainless steel or high-alloy materials to extend bit life. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed. Follow applicable shop safety standards and wear appropriate eye protection during use.

Technical Specifications

• Diameter: 27/64 inch
• Overall Length (OAL): 12 inches
• Material: Cobalt
• Weight: 0.24 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: AC712-027-I