This standard specifies the main basic parameters, technical requirements, load carrying capacity and selection methods of straight profile toroidal worm reducer. It is mainly used for the reduction transmission of metallurgical, mining, lifting, transportation, petroleum, chemical, construction and other mechanical equipment. The use condition is: the two-axis stagger angle is 90°; the worm speed does not exceed 1500r/min; the worm intermediate plane indexing circular sliding speed does not exceed 16m/s; the reducer working ambient temperature is 0～40°C, when the ambient temperature Below 0 ° C or above 40 ° C, the lubricating oil should be heated or cooled accordingly; the worm shaft can run in the forward and reverse directions.
