Abstract: A grinding disk in particular for rotary fine machining of surfaces has a support plate and a drive connector connecting the grinding disk to a rotary drive machine. The drive connector is provided at a top side of the support plate. An elastically deformable cushion is disposed at a bottom side of the support plate. The cushion is covered with a working medium or with an adhesive coating for detachable attachment of a working medium disk. A cover is disposed on the support plate so as to define an axial intermediate spacing, wherein the cover is embodied as a mechanically loadable structural part and is connected fixedly at least to an outer rim of the support plate. Primarily radially extending ribs are disposed between the support plate and the cover and connected at least at some locations with the support plate and the cover.

Abstract: Supporting plate for rotating tools for fine machining of surfaces, such as grinding or polishing with a front working surface or an adhering surface for detachably mounting a grinding, polishing, or similar working medium disk, having a rear driving connection and configured to provide for simple manipulation, advantageously priced adaptability and a rapid exchangeability. The supporting plate has an elastically deformable, exchangeability plate and an accommodating carrier. The exchangeable plate provides the working or adhering surface and has an interior space engaged from the rear by a coupling structure of the accommodating carrier with a bayonet or similar quick-change connection at an edge.