Smooth running, low noise. Small Cubage, light weight, long working- ... application of gear reducer: 1.Speed of High-speed Shaft is less than 1500r/min. 2.Speed of Circle of rotation gear ... 93 %, three more than 90 %. 3.Smooth running, low noise. 4.Small Cubage, light weight, long working-life ... direction 11 transmission ratio, 9 installing mode and 3 low-speed axle edge type.ZD10/ZD15/ZD20/ZD25/ZD30/ZD35 ...