F 4 Bearing series (series name) Description Page 49500 Single-row tapered roller bearing, inch series A9, A55, A56, A59, B239, B243 4UJ Cylindrical roller bearing for railway rolling stock axle journal C22, C25 511 Single direction thrust ball bearing with flat back face A11, A55, A56, A59, B337, B338 512 Single direction thrust ball bearing with flat back face A11, A55, A56, A59, B337, B338 513 Single direction thrust ball bearing with flat back face A11, A55, A56, A59, B337, B338 514 Single direction thrust ball bearing with flat back face A11, A55, A56, A59, B337, B338 52 Double-row angular contact ball bearing A5, A55, A56, B55, B118 52··2RS Double-row angular contact ball bearing, contact sealed A5, A56, B55, B118 52··ZZ Double-row angular contact ball bearing, shielded A5, A56, B55, B118 52000 Single-row tapered roller bearing, inch series A9, A55, A56, A59, B261, B263 522 Double direction thrust ball bearing with flat back faces A11, A55, A56, B337, B348 523 Double direction thrust ball bearing with flat back faces A11, A55, A56, B337, B348 524 Double direction thrust ball bearing with flat back faces A11, A55, A56, B337, B348 525 Single-row tapered roller bearing, inch series A9, A55, A56, A59, B235, B237, B238, B241, B243 53 Double-row angular contact ball bearing A5, A55, A56, B55, B118 53··2RS Double-row angular contact ball bearing, contact sealed A5, A56, B55, B118 53··ZZ Double-row angular contact ball bearing, shielded A5, A56, B55, B118 532 Single direction thrust ball bearing with spherical back face A11, A55, A56, A59, B337, B338 532··U Single direction thrust ball bearing with aligning seat race A11, A55, A56, A59, B337, B338 533 Single direction thrust ball bearing with spherical back face A11, A55, A56, A59, B337, B338 533··U Single direction thrust ball bearing with aligning seat race A11, A55, A56, A59, B337, B338 534 Single direction thrust ball bearing with spherical back face A11, A55, A56, A59, B337, B338 534··U Single direction thrust ball bearing with aligning seat race A11, A55, A56, A59, B337, B338 535 Single-row tapered roller bearing, inch series A9, A55, A56, A59, B237, B239, B245 542 Double direction thrust ball bearing with spherical back faces A11, A55, A56, B337, B348 542··U Double direction thrust ball bearing with aligning seat races A11, A55, A56, B337, B348 543 Double direction thrust ball bearing with spherical back faces A11, A55, A56, B337, B348 543··U Double direction thrust ball bearing with aligning seat races A11, A55, A56, B337, B348 544 Double direction thrust ball bearing with spherical back faces A11, A55, A56, B337, B348