... .Speed adjustable Drawings and Parameters of Forward and Backward Running Low Speed High Torque Motors(300Nm~500Nm) Rated TorquePowerAC VoltageSpeedReverse timesCurrentEfficiencyWeight300Nm5 ... structure, simple structure, well thermolysis performance, low inertia, well protecting ability, low cost. 5. Wind cooling, low temperature, long life. 6.Multiple running model ...