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The EAGLE CUTTING TOOL A712-019-I is a high-speed steel (HSS) aircraft extension drill bit designed for drilling in tight or deep-reach applications where a standard-length bit cannot access the workpoint. At 19/64 inch in diameter with a 12-inch overall length (OAL), this bit provides the extended reach required for aerospace, automotive, marine, and structural fabrication work. HSS construction offers reliable hardness and heat resistance for drilling through aluminum, mild steel, and similar materials. Installers and fabricators in HVAC, electrical, and general mechanical trades reach for aircraft-length bits when working through framing, ductwork flanges, or structural panels.
This drill bit is suited for use in residential and commercial construction, HVAC duct and equipment installation, electrical rough-in, and fabrication environments where extended reach is a recurring requirement. The 19/64 inch diameter is a common size for clearance holes and pilot applications in sheet metal and light structural work. It is driven by a standard drill chuck and works with corded or cordless drill motors with a compatible chuck capacity.
Designed as an OEM-style replacement and standard-use aircraft extension drill bit for use in any application requiring a 19/64 inch diameter HSS bit with a 12-inch overall length.
Aircraft extension drill bits should be used at appropriate speeds for the material being drilled — lower RPM is generally recommended for larger diameters and harder materials to prevent bit deflection or breakage. Secure the workpiece before drilling and use cutting fluid when drilling ferrous metals to extend bit life. Inspect the bit for wear or chipping before each use. Disposal of worn HSS tooling should follow applicable shop safety procedures.
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