Which component is responsible for transmitting thrust from the propellers?

The Kingsbury thrust bearing is specifically designed to accommodate thrust loads generated by the propellers within a marine propulsion system. When propellers rotate, they produce thrust, which must be effectively transmitted to the vessel's hull to drive the vessel forward. The Kingsbury thrust bearing operates by providing a surface where the axial thrust can be transmitted without introducing excessive wear or damage to the components involved.

This bearing consists of a series of plates or pads that can bear thrust loads, allowing for controlled movement and reducing friction between the moving parts. Its unique design helps to stabilize the propeller shaft and maintain alignment while also managing axial loads efficiently.

In contrast, other components such as line shaft bearings and main propulsion shaft bearings primarily support the rotation and alignment of the shafts rather than bearing the thrust directly. Propeller shaft seals serve the specific function of preventing leakage from the propulsion system and protecting internal components from environmental exposure, but they do not transmit thrust. This makes the Kingsbury thrust bearing the critical piece of equipment for managing and transmitting thrust forces in marine propulsion systems.