Double Shaft Speed Reducer High Speed Gear 1:3.6 1:4 1:4.25 1:5.3 Dual Axis Planet Gear Speed-up Gearbox Double Shaft PLS56 Also Used As Speed Reducer (Color : 1pc, Size : 3.6 To 1 Reducer 56mm Planetary Gear Speed Up Planetary Gearbox this link is for gear ratio 1:13 1:15 1:18., if need other gear ratio, order other link or contact usThe multi-faceted installation, Smooth transmission, low noise, thermal performance, large carrying capacity. PLS56 56MM Double Shaft Planet Speed Increaser Can Be Used as a Reducer 1:3.6/ 1:4 /1:4.25 Gearbox This planetary gearbox, can improve the output speed. S Series Helical Worm Speed Reducers with Arm Torque Hollow Shaft... 1:13 1:15 1:18 Dual Axis Planetary Gearbox Speed-up Gearbox Double Shaft PLS56 also Used as Speed Reducer This planetary gearbox, can improve the output speed, in turn, it can also be used as a reducer from the other side. 10 To 1 Reduction Gearbox Nmrv075 Speed Worm Reducer 19mm 24mm 28mm Input Shaft - China 10 To 1 The multi-faceted installation, Smooth transmission, low noise, thermal performance, large carrying capacity.