Selling Cheap Coupling - Coupling is a device that has the function to connect two shafts to channel a motion (torque). Coupling is used as a power transmission. How the coupling works, namely the ends of the two shafts are connected to the coupling, when the shaft shafts start working (rotating), there is a beat in the coupling, to reduce this surge, the damping component is used on the coupling made of rubber or plastic (often called a rubber coupling / coupling insert).