A supply device of molten metal for application in semi-automatic centrifuge machines with one plate or for automatic machines with three or more plates to collect the molten metal from the furnace, take it to the centrifuge and pour it into the centrifuge. The supply device occupies minimum space and allows both for a side or back furnace configuration. The device includes an automatic and programmable assembly having an arm that is radially secured on one end to the rotating shaft of a geared motor fitted to the centrifuge. On the other, the device is articulated to another vertical arm, holding a ladle at its lower end. The operation of the device is synchronized with the operation of the centrifuge, increasing productivity, reducing hazards for workers, reducing energy consumption, and improving the finish of the final product.