An apparatus includes first and second wheel sections configured to mate in axially opposed relationship to define a rotatable wheel body. The wheel body has a peripheral outer surface extending circumferentially about an axis of rotation and a bearing cavity centered on the axis. Each of the wheel sections has an axial projection and an axial recess configured to receive the projection on the other of the wheel sections. This limits rotation of the wheel sections relative to each other about the axis when the wheel sections are received in the axially opposed relationship.