... , 7000A, 7000B Group supporting contact ball bearing Face-to-face (DB), back-to-back (DF), tandem (DT), triple Double row angular contact ... its sub-group with back-to-back manner (DB), face-to-face (DF), and tandem (DT) in three. Supporting back-to-back group for contact ... ball bearing under a separate or combined radial and axial load, to be capable ...