Twin chain thruster Work principle: It is a type of conveyor equipment used for thrusting drying trolley in rubber drying process. It consists of cycloid gearbox, transmission shaft, coupler, support, beam, sprockets and chains. Function: The transmission shaft rotates by the driving of the motor through the gearbox and the coupler, which moves the sprocket and chains, thrusting the trolley forward into the drying tunnel. -