NN(U) Type Cylindrical Roller Bearing

NN(U) Type Cylindrical Roller Bearing

The outer ring of NN type cylindrical roller bearing has no outer walls while the inner ring has double inner walls and middle wall in the middle. In comparison, the outer ring of NNU type cylindrical roller bearing has double outer walls and middle wall in the middle while the inner ring has no inner walls. The two types bearings both allow axial displacement of two directions between the axis and bearing block. Therefore, this structure is suitable for moving bearings and the cage of the bearing mainly uses car business entity cage.