What is the first and second stage gear reducer

Update:21 Jan 2020

Find out what is the first reduction gear, the second reduction gear before first look at the meaning of the reduction series.
The number of reducer stages refers to the number of gear sets in the reducer.

The main transmission structure of the reducer includes planetary gear, sun gear and inner ring gear. The progression here refers to a set of planetary gear, sun gear and inner ring gear of the planetary reducer, which is called the first stage.
The second level refers to two sets, and the third level refers to three sets.

The reason of reducer classification
Because a set of planetary gears can not meet the larger transmission ratio, sometimes two or three sets are needed to meet the requirements of supporting the larger transmission ratio. Because the number of planetary gears is increased, the length of the second or third stage reducer will be increased, and the efficiency will be decreased.


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