Needle roller bearings

      Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. Such rollers are called needle rollers. Despite having a smaller cross section, the bearing still has a high load bearing capacity. The needle roller bearing is equipped with thin and long rollers, so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings. Smaller, especially suitable for support structures with limited radial installation size.

      Depending on the application, a bearing without an inner ring or a needle roller and cage assembly can be selected. At this time, the surface of the journal and the surface of the housing hole matched with 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 the bearing with ring, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or housing hole should be similar to the raceway of the bearing ring. This type of bearing can only bear radial loads.

      Needle roller bearings have a large bearing capacity and are suitable for supporting structures with limited installation dimensions. The surface of the journal is hardened as a rolling surface, and the bearing is fitted into the seat hole with a press fit, and there is no need to axially position it.