Abstract: An apparatus for balancing unbalanced bodies such as motor vehicle wheels having a rotating mounting shaft, a pedestal body in which the mounting shaft is arranged and transducers and other support means for supporting the mounting shaft. The lateral influence of the transducers on each other and the tilting impact of the transducers upon the mounting shaft at their points of contact therewith are minimized by disposing the transducers, other support means and the longitudinal axis of the mounting shaft in a single horizontal plane.

Abstract: Apparatus for mounting and centering a wheel on a mounting spindle of a testing machine, including a shaft portion, a centering taper member on the shaft portion for engaging a center hole in a wheel to be mounted, a fixing nut which can be screwed on the shaft portion for pressing the wheel against the centering taper member for centering the wheel, a spring operable to urge the taper member towards the nut, a housing member on the shaft portion around a part of the spring, a covering means covering the spring for protection thereof, the covering means being disposed on the shaft portion and at least partly in the housing member, and means for limiting the movement of the spring towards a fully relaxed condition thereof thereby to maintain a pre-stressing in the spring.