The cylindrical rollers and raceways are linear contact bearings, with large load capacity, mainly bearing radial loads. The friction between the rolling element and the ring flange is small, which is suitable for telling rotation. According to whether the ring has a flange or not, it can be divided into single row bearings such as NU, NJ, NUP, N, NF, etc., and double row bearings such as NNU and NN.
