Pivot bearings are mechanical components that allow for rotational movement around a fixed point. They are commonly used in various applications, such as in automobiles, industrial machinery, and aerospace systems. These bearings help reduce friction and wear, ensuring smooth operation and extending the lifespan of moving parts. Typically, pivot bearings consist of a shaft and a housing, where the shaft rotates within the housing. They can be made from different materials, including metal and plastic, depending on the specific requirements of the application. Proper lubrication is essential for maintaining their performance and preventing damage over time.