Worm gearboxes can be mutually combined in a way to form two reduction stages arranged in tandem, i.e. in a mutual series connection. The usual combinations of worm gearboxes include two alternatives: either both units are of the same size or smaller unit upstream is combined with a larger unit downstream. The largest unit is always placed downstream because torque acting on the unit downstream, the one closest to the unit, is much higher.
Both the total efficiency and the total ratio of the combined worm gearboxes come from the efficiency and the ratio of the two individual combined worm gearboxes.
It is strictly imperative that the gearbox selection is effected basing on maximum output torque and not on input power (since this one is mostly exorbitant).
Worm gearboxes can be used in different industrial domains such as: food industry, belt conveyors and conveyors in general, mixers, agitators, dosing machines, bread machines, packaging machines, printing machines, industrial automation equipments, wood processing machines.