A sliding bearing hinge is a type of hinge that uses sliding bearings to facilitate the movement of a door or other moving object. Sliding bearings are small, round metal elements made of metal or other sturdy materials and coated with a layer of lubricant to facilitate movement. Sliding bearing hinges are often used for doors that are heavy or heavily used, because they move more smoothly than traditional hinges and have less friction. They can also be used for moving other objects, such as windows or shutters. Sliding bearing hinges are made of various materials, such as steel, stainless steel, brass, or aluminum, depending on the purpose for which they are used.