Cylindrical Needle Rollers

Needle roller refers to the rotating body on the needle roller bearing, which is mainly used in all kinds of bearings. The roller is as thin and long as needle. This kind of bearing has high load bearing capacity and compact radial structure. The needle roller bearing is equipped with thin and long rollers (the roller length is 3 ~ 10 times of the diameter, and the diameter is generally no more than 5mm). Therefore, the radial structure is compact. Its inner diameter and load capacity are the same as those of other types of bearings, and the outer diameter is the smallest. It is especially suitable for the support results with limited radial installation size. The bearing without inner ring or needle roller and cage assembly can be selected according to different application occasions. At this time, the journal surface and shell hole surface matching with the bearing are directly used as the inner and outer rolling surface of the bearing. In order to ensure the same load capacity and operation performance as the bearing with ring, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or outer shell hole shall be similar to that of the bearing ring. This kind of bearing can only bear radial load.