Full-complement ball bearings can hold more balls than deep groove ball bearings as filling holes are designed on the inner and outer rings. Due to the presence of filling holes, they are not suitable for applications with large axial loads. The BL2 and BL3 types of bearings have the same main dimensions as the 62 and 63 types of single-row deep groove ball bearings. Besides the open type, there is also the ZZ type with steel plate dust covers. Additionally, when using the bearings, it is advisable to position the filling hole on the outer ring as the non-loading ring as much as possible. The cage is a stamped cage.