Cylindrical roller and the raceway is in line contact bearings. Load capacity, the main radial load. Rolling ring wall friction small, suitable for high-speed rotation. According to ring without ribs, it can be divided into NU, NJ, NUP, N, NF and other single row  cylindrical roller bearings, and NNU, NN and other double row cylindrical roller bearings. The bearing is the inner, outer separable structure.
Inner or outer wall of the  cylindrical roller bearings, the inner ring and outer ring can be relative to the axial movement, so it can be used as a free end bearings. On either side of the inner and outer double wall, rings the other side there is a single wall of  cylindrical roller bearings, can withstand a certain degree of axial load direction. General use of steel stamping cage, or copper alloy solid cage. But there are also part of the use of polyamide forming cage.