Advantage:

1.Enveloping worm sets power is 2 to 3 times of   with the same one center distance , under the consituation of transmission the same power,circular reducer gearboxs outline size only is 1/2 to 1/3 of common cyclindrical worm reducer 

2.Because enveloping worm set form s consituation is well,so in the process of work, to be liquid lubrication or critical liquid lubrication. There be not directly friction ,between worm gear and worm wheel ,so   is small, transmission efficiency is high

3.The main form of invalidity for worm is abrasion, and . These matter all be got conquered successfully, under the same condition, s useful life is 5 to 10 times of common .