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The EAGLE CUTTING TOOL A712-011-I is a high-speed steel (HSS) aircraft-length drill bit sized at 11/64 inch in diameter with a 12-inch overall length (OAL). The extended reach makes it well suited for drilling through deep stock, structural assemblies, and layered materials where a standard-length bit cannot access the work zone. HSS construction provides the hardness and heat resistance needed for repeated use on steel, aluminum, and similar metals. This bit is a go-to tool for sheet metal mechanics, HVAC installers, and aircraft maintenance technicians who need controlled penetration at depth.
Aircraft-length drill bits like the A712-011-I are commonly used in applications where the drill point must reach far beyond what a jobber-length bit allows. Typical use cases include drilling through HVAC duct frameworks, structural steel channels, bulkheads, and multi-layer sheet metal assemblies. The 11/64-inch diameter is a common size for pilot holes, pop-rivet preparation, and light fastener clearance work in both residential mechanical systems and light commercial construction environments.
Designed as a standard aircraft-length HSS drill bit compatible with any 3/8-inch or 1/2-inch chuck drill motor, right-angle drill, or drill press accepting round-shank bits in the 11/64-inch diameter range.
Secure the bit firmly in the chuck and verify runout before drilling into finished assemblies. Use cutting fluid or a suitable lubricant when drilling ferrous metals to extend bit life and reduce heat. Always wear appropriate eye protection and secure the workpiece before beginning the cut. Dispose of worn or chipped bits promptly — a damaged HSS bit can deflect or break under load.
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