<p>The invention concerns an electrostatic paint spray gun which atomises the paint material by means of a rotary bell 10. The bell 10 is rotated by the reaction of outflowing air jets which flow from the hub 24 or the outer surface of the bell through nozzles 31, 37 arranged there at an angle to the rotational axis of the bell. The compressed air introduced into the ball via a line 9 provides an air bearing for the bell. The air flows from the nozzles towards an atomization edge 36 of the bell to atomise paint fed from a conduit 17. <IMAGE></p>
