When the round vibration sieve runs, the material is first sent to the screen, and the material is evenly separated on the sieve mesh. The rolling bearings of the screen will be stressful by highly impact loads. Moreover, while rotating the sieve bearing around its own axis, it follows a method of circular, ellipse or straight vibration. This can lead to a high radial acceleration, thereby a large stress on the bearing, especially the maintenance of the shelf. Running speed is usually very high. Therefore, the bearing temperature is as high as 20 to 30 degrees. The Kailin is higher than the normal application. In addition, the severe deviation between the bearing position and the severe deflection of the shaft must be considered