Hi guyz, I need some help in choosing the shaft couplings to connect the motor to the gear and from gear to the wheel. The motor shaft is 11 mm and the gear shaft is 24 mm. (Max torque 2 Nm, Max speed 70 rpm) Output of the gear shaft is 32 mm and the wheel shaft is 30 mm. (Max torque 112.5 Nm, Max speed about 1.24 rpm) I've come across two types of couplings which are helical and below shaft couplings. Which one is better? Or do you guyz have better recommendations? Thank you very much.