Eagle Cutting Tool AC712-015-I Cobalt Aircraft Drill 15/64

Product Description

The EAGLE CUTTING TOOL AC712-015-I is a cobalt aircraft extension drill bit designed for drilling through tough materials in tight or deep-reach applications. Built to a 15/64 inch diameter with a 12 inch overall length, this bit provides the extended reach required for airframe, HVAC, and mechanical installation work where standard-length drills cannot access the workpiece. The cobalt construction improves heat and wear resistance compared to standard high-speed steel, making it a practical choice for drilling stainless steel, hardened alloys, and other abrasion-resistant materials encountered in trade fieldwork.

This drill bit is suited for use by HVAC technicians, pipefitters, electricians, and sheet metal workers who need to bore through structural assemblies, ductwork framing, or wall cavities with limited clearance. The 12 inch OAL is a standard aircraft extension length, allowing drilling through deep structural members or through multiple layers of material in a single pass. It is appropriate for both stationary drill press use and portable hand-drill applications where controlled feed rate is maintained.

Key Features

• 15/64 inch diameter provides close fractional sizing for clearance and pilot holes
• 12 inch overall length delivers extended reach for deep or obstructed drilling locations
• Cobalt alloy construction increases heat resistance and edge retention in hard materials
• Aircraft extension geometry supports use in hand drills and drill presses
• Minimum order quantity of 1 allows single-unit purchase for job-specific needs

Compatibility

Designed as a standard aircraft extension drill bit compatible with 3/8 inch and 1/2 inch keyed or keyless drill chucks that accept straight-shank bits at 15/64 inch diameter.

Installation Notes

Cobalt drill bits should be installed and operated by qualified tradespeople following applicable workplace safety standards. Secure the workpiece before drilling and use appropriate cutting fluid or lubrication when boring through hardened or stainless steel to extend bit life and reduce heat buildup. Match spindle speed to material hardness — harder materials require lower RPM and steady feed pressure. Inspect the cutting edges before each use and replace the bit if chipping or heat discoloration is present.

Technical Specifications

• Diameter: 15/64 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: AC712-015-I