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.
1. Selection and control of shaft and bearing chamber tolerances: After the roller bearing is pressed into the roller bearing, it should rotate flexibly without blocking. If there is obvious inflexibility in rotation, the size of the shaft is too large, and the tolerance must be adjusted downward. If the roller bearing is pressed into the shaft and turned by hand, there is a clear "rustle" feeling, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, it is necessary to control the roundness when controlling the tolerance of the shaft and the roller bearing room. At present, many domestic manufacturers only control the tolerance and do not control the roundness.
2. Roller bearing assembly methods of roller bearing manufacturers: Because roller bearings are high-precision products, improper assembly can easily cause damage to the roller bearing channels, resulting in damage to the roller bearings. Roller bearings should have a special mold when they are assembled. They cannot be beaten at will. When they are pressed into the shaft, they can only be stressed in small circles. When they are pressed in large circles, they can only be stressed in large circles. It is required to use air pressure or hydraulic pressure during assembly, and the upper and lower molds must be outside the horizontal state when press-fitting. If it is inclined, it will cause the roller bearing channel to be damaged due to stress, which will cause the roller bearing to conduct sound.