In the shipbuilding industry, needle roller bearings have critical applications. The propulsion system of a ship, such as the propeller shaft, uses needle roller bearings with their small cross-sectional size and high radial bearing capacity to withstand huge loads in a limited space, ensuring stable operation of the propeller and achieving efficient power transmission. In the servo system of a ship, needle roller bearings can accurately control the rotation of the rudder blades, ensuring precise adjustment of the ship's navigation direction. In addition, needle roller bearings can reduce friction between components, improve the reliability and durability of various mechanical equipment on board, such as windlass and crane, and adapt to the long-term operation needs of ships in complex marine environments, providing strong support for the normal navigation and operation of ships.