What is the main function of a thrust bearing in a marine engine?

The main function of a thrust bearing in a marine engine is to absorb the thrust generated by the propeller. As the propeller rotates, it creates a force that pushes the engine and the entire vessel forward. This thrust generates axial loads that must be managed to prevent excessive wear and potential damage to the engine components. A thrust bearing is designed to support these axial loads and ensure smooth operation of the drive system. By effectively absorbing the thrust, it prevents the engine shaft from moving excessively forward or backward, thereby maintaining proper alignment and reducing the risk of mechanical failure.

While increasing engine efficiency, reducing noise levels, and stabilizing the hull are important considerations in marine engineering, they do not capture the primary role of the thrust bearing, which is focused specifically on managing thrust to ensure the integrity and durability of the propulsion system.