The present disclosure relates to a grinding head (1) for a floor grinding machine (100) for grinding floor surfaces of stone or stone-like material. The grinding head comprises a lower casing member (3), comprising a lower support (31), an upper casing member (2), comprising an upper cover (21), a first belt pulley (611), arranged on an axle extending substantially parallel with an axis of rotation of the grinding head (1), and a second belt pulley (8), spaced from the first belt pulley (611) in a direction perpendicular to the axis of rotation of the grinding head (1), and partially overlapping the first belt pulley (611), its associated axle and/or its associated bearing, as seen in a plane parallel with the lower support (31). The second belt pulley (8) comprises an edge recess (81), which is sized and adapted such that when the edge recess (81) is arranged with its opening towards the axis of rotation of the first belt pulley (611), the first belt pulley (611), its associated axle and/or its associated bearing is free from said overlap.