Henan treasure up east China crane co., LTD. Product introduction: 20 tons of HM type electric hoist reducer is special hoisting electric hoist reducer, the reducer is composed of triple reduction, has the following advantages: 1, large transmission ratio, high driving accuracy;2, compact structure, low noise;3, use machine oil lubrication, the working environment optimization;4, box, box cover using machining centers, high machining accuracy, good gear meshing condition;5, adopt bevel gear design, with large carrying capacity, under impact load ability.