Eaton Vickers Hydraulic Vane Motor, Design 20-29, 25M, 35M, 45M, ... 46M, 51M for heavy duty bearing Eaton Vickers Hydraulic Vane Motor, Design 20-29, 25M, 35M, 45M, 50M ... 46M, 51M for heavy duty bearing.Vickers high performance vane motors, when properly installed in a hydraulic circuit, convert ... principally consists of a ring, rotor, ten vanes and two pressure plates. The rotor is splined and mates with ...