How to change Caster?

casters have become a necessary part in our lives, But when it is broken, you will need to replace them by yourself.

Take casters of chairs for example, traditional chair casters are pivoted, that is, wheels are rotating around an axis in the center. To improve chair casters rolling capability, we can choose air cushion to surround the wheels. The air cushion can not only reduce the internal friction of casters even more for the extremely little friction between air and wheels, but also reduce the damage caused by friction and get a better effect than lube. Of course, the air cushion is not needed all the time, but only at the time of moving by filling air into the interspaces around the wheels using air pump. ?

Another idea is to make casters equipped with electro-motors. Although traditional casters facilitate the movement of furniture, the energy of moving items still comes from human beings. If we can drive casters with motors, then the movement of furniture almost requires nothing but directions from human beings.?

Apart from the mechanism improvement, some other aspects of chair casters also should be modified for more comfort. For example, casters which can be folded may be more suitable for chairs. Folding casters can fulfill the same function when they are unfolded on the ground, but also can be folded into legs when there is no movement. With this kind of casters, we can sit more steadily and safely when we dont move since the casters are folded. Also the folding casters have no interference with the appearance of chairs.?