Milwaukee 48-89-2771 Black Oxide Aircraft Drill Bit

Product Description

The MILWAUKEE 48-89-2771 is a black oxide aircraft-length drill bit designed for extra reach and deep drilling in metal, wood, and PVC. At 12 inches in overall length, this single-end bit features a 135-degree split point tip that starts on contact and prevents walking, producing fast, accurate holes without a center punch. The THUNDERBOLT web construction extends service life and improves drilling speed. A 3-flat shank design locks the bit firmly in the chuck to prevent slipping under load. Black oxide coating adds lubricity and corrosion resistance for extended bit life.

Aircraft-length drill bits are used where standard-length bits cannot reach — deep assemblies, structural framing, HVAC ductwork penetrations, electrical conduit rough-in, and plumbing rough-in through deep framing members. The reduced shank diameter allows this 12-inch bit to seat in a standard 3/8-inch chuck, making it compatible with a wide range of corded and cordless drills already on the job. Electricians, plumbers, HVAC technicians, and general contractors regularly use aircraft-length bits for through-wall and through-joist drilling applications.

Key Features

• 135-degree split point tip starts on contact and prevents walking for accurate hole placement
• THUNDERBOLT web design provides longer service life and faster drilling performance
• 3-flat shank prevents slipping in the drill chuck during high-torque applications
• Extended 12-inch aircraft length reaches deep or obstructed drilling locations
• Reduced shank diameter fits standard 3/8-inch drill chucks
• Black oxide coating resists corrosion and provides lubricity to reduce friction

Compatibility

Designed for use in standard 3/8-inch drill chucks on corded and cordless drills. Suitable for drilling in metal, wood, and PVC.

Installation Notes

Aircraft-length bits are installed and operated by electricians, plumbers, HVAC technicians, and carpenters during rough-in phases. Ensure the 3-flat shank is fully seated and the chuck is tightened securely before operation. Use appropriate drilling speed for the material being drilled — lower speeds for metal, higher speeds for wood and PVC. Wear eye protection and verify that no utilities are present in the drilling path before proceeding.