a mobile machine for screeding floor surfaces and the like comprises a planet disk , which is rotatably supported and driven by a drive motor , and which carries at least one screeding disk , operatively connected to the drive motor and defining one screeding plane . the operative connection comprises at least one belt or chain running over a belt sheave connected to the screeding disk , and a belt sheave connected to the drive motor . the belt sheave of the screeding disk has a central stub axle forming part of an automotive wheel hub , comprising wheel bolts attached to said planet disk .