Eagle Cutting Tool A712-121-I Hss Aircraft Drill 12 Inch

Product Description

The EAGLE CUTTING TOOL A712-121-I is a Number 21 high-speed steel (HSS) aircraft-extension drill bit with a 12-inch overall length (OAL). Designed for drilling in tight or deep access applications, this extended-length bit is built for metalworking tasks that standard-length drills cannot reach. The HSS construction provides the hardness and heat resistance needed for drilling steel, aluminum, and other metals common in aviation, HVAC ductwork, sheet metal fabrication, and general mechanical work. Machinists, aircraft maintenance technicians, and sheet metal workers are the primary users of this tool.

This aircraft drill is suited for production and maintenance environments where reach is a limiting factor. The 12-inch OAL allows drilling through deep structural members, stacked panels, or confined assemblies without repositioning the workpiece. It is commonly used in aerospace maintenance, HVAC installation, electrical conduit work, and industrial fabrication wherever a standard-length bit falls short.

Key Features

• Number 21 wire gauge diameter for precise hole sizing in metal applications
• 12-inch overall length provides extended reach in confined or deep-access work areas
• High-speed steel construction resists heat buildup during continuous drilling
• Aircraft-style geometry optimized for drilling metal, including aluminum and mild steel
• Minimum order quantity of 1, available as a single unit

Compatibility

Designed as an OEM-style replacement or standard supply item for use with 3/8-inch or larger keyed and keyless drill chucks accepting wire gauge drill bits.

Installation Notes

This drill bit is installed and used by machinists, aircraft maintenance technicians, and sheet metal workers using standard drill equipment. Secure the bit firmly in the chuck and verify runout before drilling. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and maintain hole quality. Follow applicable shop safety procedures including eye protection and securing the workpiece before operation.

Technical Specifications

• Drill Size: Number 21
• Overall Length (OAL): 12 inches
• Material: High-Speed Steel (HSS)
• Weight: 0.07 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: A712-121-I