What is the function of accessory bearings?

What is the function of accessory bearings?

• A. Support the compressor rotors
• B. Absorb loads created by drive shafts and gears; allows accessory shafts and gears to rotate freely
• C. Act like a maze
• D. Use reverse threading to prevent leaks

Answer: (B)

The function of accessory bearings is to absorb the loads created by drive shafts and gears and to keep accessory shafts and gears rotating freely. In an engine’s accessory gearbox, these bearings support the shafts that drive pumps, generators, starters, and other accessories. They take both radial loads (from gear mesh and shaft bending) and axial loads (from gear thrust or belt tensions) and maintain proper alignment, which reduces wear and keeps the gears meshing smoothly. This smooth rotation and load handling are what allow the accessory devices to operate reliably with minimal friction. They don’t support compressor rotors, aren’t a maze, and aren’t related to reverse threading for leaks.

The function of accessory bearings is to absorb the loads created by drive shafts and gears and to keep accessory shafts and gears rotating freely. In an engine’s accessory gearbox, these bearings support the shafts that drive pumps, generators, starters, and other accessories. They take both radial loads (from gear mesh and shaft bending) and axial loads (from gear thrust or belt tensions) and maintain proper alignment, which reduces wear and keeps the gears meshing smoothly. This smooth rotation and load handling are what allow the accessory devices to operate reliably with minimal friction. They don’t support compressor rotors, aren’t a maze, and aren’t related to reverse threading for leaks.