A rotational mixing machine (10), comprising a housing (12) in which at least drive shaft (14, 16) is extending in a longitudinal direction, wherein an end portion of the drive shaft (14, 16) passes through a housing wall in the longitudinal direction, wherein the end portion of the drive shaft (14, 16) extending through the housing (12) is coupled rotationally fixed and axially movable to a drive unit (20, 21) adapted to drive at least the drive shaft (14, 16), wherein the drive unit (20, 21) is mounted to the housing (12) via elastic elements and/ or damping elements such that the drive unit (20, 21) is capable of moving at least in the longitudinal direction relative to the respective drive shaft (14, 16).