A holding-system of V4A-disks, which was developed by us
and for which we took out a patent (Pat.-Nr.: 19809800),
causes absolute concentric running (at a statically
unbalanced state) through springy thrust-pieces.
Furthermore the arrangement of the weights compensates
a great part of the dynamic unbalanced state.
Resulting effects of our holding-disks are highest concentric
running, about ten per cent of electric power saving, as well
as the reduction of the mounting of the drive to a minimum.