The lubrication units belonging to ZG.B series are complete systems to produce the oil+air mixture, obtained dosing small amonut of oil in a continuous flow of air. The Oil+air mixer is not provided with electronic monitoring. The unit is controlled by a PLC which adjust the quantity of lubricant delivered; the controlling elements communicate with PLC programmable unit, which is linked to the central unit of the machine the unit is mounted on. The unit can be assembled inside a metallic box, and has got filters both on the air line. The management software also contains a specific option to use also GMN spindles (prelubrication).