GRINDING HEAD FOR FLOOR GRINDING MACHINE AND METHOD OF ASSEMBLING A GRINDING HEAD, SETTING A BELT TENSIONER, SERVICING, ASSEMBLING OR DISASSEMBLING A BELT PULLEY FOR A FLOOR GRINDING MACHINE

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 51 running over said belt pulleys and said drive axle, and a belt tensioner 4. The belt tensioner 4 comprises a tensioner pulley 41, displaceable by rotation about a setting axis 43 and spaced from the tensioner pulley 41 by a pulley lever 42, where the setting axis 43 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 43. The tensioner setting device is accessible from outside of the grinding head casing, such that the belt tensioner 4 can be adjusted while the grinding head is in an assembled state.