At first, the eccentric bearing is a very special cylindrical roller bearing. Its structure is simple and easy to use. There are two types of eccentric bearings, double row eccentric bearings, single row cylindrical roller bearings, and eccentric sleeves. Its most notable feature is that the inner hole of the inner ring is eccentric, and the inner side of the eccentric hole has a keyway. Compared with other bearings, roller bearings can only drive the shaft to rotate. But the center of the eccentric bearing is not in the center of the axis, so it can not only rotate but also drive other equipment to rotate together. Eccentric bearings are used on different equipment and have different eccentricities. Therefore, we must pay great attention to the selection. Some insert bearings can match with an eccentric lock to achieve eccentric function. Such as bearing YET205 and YET 208 bearing.