An assembly for moving a fluid includes: a housing having an inlet and an outlet； a first shaft member fixedly coupled to the housing, the first shaft member having a central axis； a stator assembly fixedly coupled to the housing, disposed around the central axis and spaced radially outward from the first shaft member； and a driven assembly. The driven assembly includes: a second shaft member having a first end, a second end, and a cylindrical cavity defined therein extending inward from the first end； a magnetic ring fixedly coupled to the second shaft member at or about the first end； and an arrangement fixedly coupled to the second shaft member at or about the second end. A bearing system is disposed between the first shaft member and the second shaft member such that the driven assembly is rotatably coupled to the first shaft member.
