QJ series reducer applied to crane opening mechanism, is also widely used in transportation, metallurgy, mine, chemical industry 1. Characteristics1)wide range of reduction ratio, the nominal transmission ratio 10-200;2)high transmission efficiency; II of 96%, the three-tier up to 94%;3)operation is smooth, low noise;4)as a result of the 42CrMo, 35Crmo through forging quenching and tempering, ...