... , metallurgy, mining, cranes, cement, conveyors, paper, rubber&pla single stage ratio 11, 17, 23, 29, 35, 43, 59, ... 71, 87 input speed : 1500rpm, 1000rpmsingle stage power 0.37kw, 0.25kw,0.75kw,0.55kw, 1 ... 18.5kw, 22kw, 37kw, 45kw, 55kw, 30kw, 75kw double stage ratio: 121, 187, 289, 391, 473, 595, 731, ... , 1849, 2065, 2537, 3481, 4189, 5133, 7569.double stage power: 0.25kw, 0.37kw, 0.55kw, 0.75kw, ...