The roller of Cylindrical roller bearing generally are led by one bearing ring wiht two rims,the cage,roller and leading ring are made one assembly,it can be separated with the other bearing ring,so it is a separable bearing,This kind of bearing can be easily set and took down,we can see its advantage especially when the inner and outer ring and the axis ,the formwork are all interference fit. Generally this kind of bearings is only used to take radial loads,only the simple-row bearing with rimmed inner and outer ring can take low axial loads,Compare with the deep-groove ball bearings with the same shape and size,this kind of bearings has better quality to take higher radial loads,but the processing requirements are higher for the related parts such as axis,formwork bore.