During the use of the divider, it is necessary to ensure that it is started and stopped in the stationary position. During the rotation process, collisions and starts and stops in the driving position must be avoided. Starting and stopping in a position other than the stationary position is considered abnormal use. Abnormal use can cause great damage to the divider and lead to inaccurate positioning. In severe cases, it can cause the internal needle roller bearing to break. When the cam divider is not positioned accurately and the disc shakes, how can you tell whether it is caused by a collision or starting and stopping in a non-stationary position? If the inaccurate positioning, gap, and shaking are caused by a collision, usually only the bearings and indexing holes corresponding to the workstation where the collision occurred have problems. As shown in the video below, only the outer rings of two needle roller bearings are deformed and the indexing holes are deformed.