Cylindrical roller bearings are separable bearings, the installation and removal is very convenient. Divided into single row cylindrical roller bearings, double row and four columns. Installed in accordance with the rolling bearing different number of columns, cylindrical roller bearings can be divided into single row, double row and multi-row cylindrical roller bearings. One application is more cage row cylindrical roller bearings. In addition, single or double row full complement cylindrical roller and other structures of the cylindrical roller bearings.