We developed our own holding system of V4A-disks (patent pending, Pat.-number 19809800), which causes absolute concentric running at a statically unbalanced state by the use of spring thrust pieces.Furthermore the arrangement of the weights compensates a great part of the dynamic unbalanced state.
All these advantages together lead to highest concentric running, about ten per cent of electric power saving, as well as the reduction of the mounting of the driving shaft to a minimum.