The machine (10) for sanding the surface of a parquet floor (32) rests on the floor on a plurality of running rollers (14, 16, 18) and has two rolls (44, 46) which are each both rotatable about their longitudinal axis (48, 50) and can be rotated about a vertical axis (58) aligned perpendicularly to the surface of the parquet floor. The angular speed of the two …Web