Needle roller bearings radial structure is compact, its diameter size and load capacity and other types of bearing phase at the same time, the minimum outside diameter, especially for radial installation of a smaller size of the supporting structure. It can only withstand a radial load. Selection of inner or outer ring and without inner, outer rolling bearing, as the hardness of the raceway surface of the shaft or shell hole machining accuracy and surface quality should bearing ring raceway similar to ensure that the load capacity and running performance and there are rings bearing.
Single, double row K-type needle bearing structure type, press M-type, engineering plastics cage, pairs of semi-split, engineering plastic cage structure. Needle roller rolling surface of the convexity of processing, the cage surface hardens treatment, needle fenestrate non-uniform process characteristics. Gearbox needle roller bearings are often used in conjunction with the needle hub.