JS Series Reduction Gears for Central Driven mills , and deloped for large powered central driven. It consists of the Main Reduction Gears, a Low speed driven System, a Film coupling, a Lube-oil Station, A multi-path Temperature Periodic Indicator, and etc.

Range of rated power: 800~4500 KW
Input speed: 740 r/min(595 r/min for minorities)
Range of ratio: 35:1_51:1

The total number of products has reached more than 600 sets since 1985 the first is Ex-work.