Brief:Thin section bearings can be deep groove ball bearings (C), four-point contact bearings (X), angular contact ball bearings (E). The above various designs are provided in different series. Which design to use depends on the size of the cross section. The ball matches the series. Deep groove ball bearings can support bidirectional axial load and radial load. Four-point contact bearings can support bidirectional axial loads as well as radial loads; therefore, they operate in the same way as double row angular contact ball bearings.