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

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 (1) for a floor grinding machine for grinding floor surfaces of stone or stone-like material. Such a grinding head (1) comprises a grinding head casing enclosing a transmission mechanism for transferring power an ingoing axle (7) to cause the grinding head to rotate, wherein the transmission mechanism comprises at least one belt pulley (8), and at least one belt (52), wherein the belt pulley (8) presents a releasably attachable edge portion (83), which extends over more than 50, preferably more than 700 or more than 800 central angle of the belt pulley, and which, when released, is movable relative to the remainder of the belt pulley (8), such that a circumference of the belt pulley (8) is reducible, and wherein the belt (52) is resiliently flexible, such that its length is extended by 2.0 10 %, preferably 2.0-5 %, 2.2-10 % or 2.2-5 %.when in a mounted state as compared to a relaxed state. Typically, the edge portion (83) may extend over less than 120, less than 100. Fig 8a Fig 8a 52 Fig 8b 52 Fig 8c