Abstract: A bead roller sheet metal working machine (1) comprising a first drive shaft (3) and a second drive shaft (4) arranged in a plane common to both drive shafts (3, 4), wherein both drive shafts (3, 4) at their respective inner ends are driven by means of a drive unit (8) which by a first transmission (13) drives said drive shafts (3, 4) to rotate in opposite rotational directions, and where said drive shafts (3, 4) at their respective outer ends are equipped with dies (5a, 5b) by means of which said sheet can be provided with beads when the sheet is forwarded between the dies (5a, 5b) along a plane substantially tangential and common to both dies, and where a greater part of mutually facing surfaces (6a, 7a) of two arms (6, 7) carrying the drive shafts (3, 4) are located at a greater distance (a) from one another than a distance (b) between the outermost ends of the drive shafts to allow a curved work piece access to the machine while working.