Depending on the application, a bearing or needle roller and cage assembly without an inner ring can be selected. At this time, the journal surface and the housing hole surface that match the bearing are directly used as the inner and outer rolling surfaces of the bearing. In order to ensure the load capacity and running performance As with bearings with rings, the hardness, machining accuracy and surface quality of the surface of the shaft or housing hole raceway should be similar to those of the bearing raceway. This type of bearing can only support radial loads.
The temperature of the bearings used in mechanical equipment is too high, such as the "fever" abnormal situation. It is a common and harmful common failure of mechanical equipment. The reasons are unknown and improper handling often results in less effort. The use of roller bearings by direct rolling bearing manufacturers Life, increase maintenance costs, and even cause bearing burnout. The selection of bearing types should be determined according to the type and size of the bearing, the size and direction of the load, and the nature of the load. The correct choice of bearing coordination should ensure the normal operation of the bearing to prevent relative rotation of the inner ring and the shaft, the outer ring and the housing hole during operation.
Generally speaking, when the direction of the working load is constant, the rotating ring has a tighter fit than the fixed ring, because the rotating ring bears the rotating load, and the non-moving ring bears the local load. When the higher the speed, the larger the load and the more intense the vibration, the tighter the fit should be selected. When bearings are mounted on thin-walled housings or hollow shafts, a tighter fit should also be used.