A drive train assembly (22) for a personal care device (10), the drive train assembly including a shaft (24) with a central axis and a plurality of pivot bearing notches (122)； a motor (130) encircling at least a portion of the shaft and configured to oscillate the shaft about the shaft's central axis； and a plurality of stationary pivot bearings (120), where at least an apex of each of the plurality of stationary pivot bearings is positioned within a respective one of the plurality of pivot bearing notches.
