Although the needle roller bearing has a small section, the bearing still has high load bearing capacity. The needle roller bearing is equipped with thin and long rollers, so the radial structure is compact. Its inner diameter size and load capacity are the same as other types of bearings, and its outer diameter is small. It is especially suitable for the supporting structure with limited radial installation size.
According to different application occasions, the bearing without inner ring or needle roller and cage assembly can be selected. At this time, the journal surface and shell hole surface matched with the bearing are directly used as the inner and outer rolling surfaces of the bearing. In order to ensure that the load capacity and operating performance are the same as those of the bearing with ferrule, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or outer shell hole should be similar to that of the bearing ferrule. This kind of bearing can only bear radial load.
According to different application occasions, the bearing without inner ring or needle roller and cage assembly can be selected. At this time, the journal surface and shell hole surface matched with the bearing are directly used as the inner and outer rolling surfaces of the bearing. In order to ensure that the load capacity and operating performance are the same as those of the bearing with ferrule, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or outer shell hole should be similar to that of the bearing ferrule. This kind of bearing can only bear radial load.
The needle roller bearing has large bearing capacity and is suitable for installing the supporting structure with limited size. The surface of the journal is hardened as the rolling surface. The bearing is installed into the seat hole with a press fit without axial positioning.
