Abstract: An apparatus for generating and spraying an aerosol which contains liquid particles in a gas stream and for pointedly supplying the aerosol to a lubricating location, comprises (a) a vessel containing a supply of liquid and a pressure space above the level of the liquid supply, (b) an atomizer disposed in the pressure space above the level of the liquid supply and comprising: (i) a spraying device for spraying the aerosol, (ii) a liquid feed line connected at one end to the liquid supply and its other end to the spraying device and including a pump for feeding the liquid, (iii) a gas feed line connected at one end to a pressure gas source and at its other end to the spraying device, (iv) at least one apertured wall disposed in the way of the trajectories of the spray jets from the spraying device and having holes for passing liquid particles of a predetermined size while separating greater liquid particles at the apertured wall, and (c) an aerosol line which connects the pressure space with a machining