Grinding head for floor grinding machine and method of setting a belt tensioner

The present disclosure relates to a grinding head for a floor grinding machine for grinding floor surfaces of stone or stone-like material. Such a grinding head comprises a hollow grinding head casing enclosing a drive axle, at least two belt pulleys associated with a respective grinding disk, a belt running over said belt pulleys and said drive axle, and a belt tensioner. The belt tensioner comprises a tensioner pulley, displaceable by rotation about a setting axis and spaced from the tensioner pulley by a pulley lever, where the setting axis is parallel with an axis of rotation of the grinding head. The casing further encloses a tensioner setting device, for setting a position of the pulley in said direction by application of a torque about the setting axis. The tensioner setting device is accessible from outside of the grinding head casing, such that the belt tensioner can be adjusted while the grinding head is in an assembled state. Drawing to be published: Fig. 6a Fig 6a 43 46 Fig 6b Fig 6c