The hanging wheel is an essential component of sliding doors commonly found in balconies, kitchens, and dining rooms. It serves the important functions of buffering and closing the door. By suspending the door panel and bearing its weight, the hanging wheel works in tandem with the hanging rail to facilitate smooth and effortless movement of the door. There are various types of hanging wheels designed for different categories of sliding doors, such as wooden door hanging wheels, glass door hanging wheels, and folding door hanging wheels.