Castor bearing is a general term, including movable casters and fixed casters. The movable castor also refers to the structure of the universal wheel, which is allowed to rotate at 360 degrees. The fixed casters are also called directional casters. Usually two kinds of casters are usually used for matching, for example, the structure of the trolley is the front two directional wheels, and the two universal wheels near the handrails are behind them.
The fixed casters have no rotating structure and can not rotate. Usually two kinds of casters are usually used together, for example, the structure of the trolley is the front two fixed wheels, and the two universal wheels near the handrails are behind them. Castors have castors of various materials, such as cast iron wheels, nylon wheels, etc.
