The article by Nikita Polyakov and Sergey Chulkin discusses the problem of balancing prefabricated propellers and its relevance for shipbuilding. The authors point out the disadvantages of existing balancing methods, especially when working with large and heavy screws, as well as adjustable pitch screws. Among the problems is the inability to accurately assess the imbalance when using traditional methods, the complexity of balancing screws of large mass and size. The purpose of the work is to create a theoretical basis for determining the imbalance of assembled propellers by determining the center of gravity of their elements. The article provides criteria for a balanced propeller element in accordance with the requirements of the Russian Maritime Register of Shipping (RMRS), as well as expressions for determining the coordinates of the center of mass of a product mounted on a balancing stand platform. The authors consider various designs of balancing stands and propose an approach that can be adapted to different types of propellers. The scientific significance of the work lies in creating a link between the requirements of the RMRS and the balancing technique through the determination of the center of mass. The practical significance lies in the possibility of applying the developed approaches for balancing large-sized and solid-cast propellers, which will increase the reliability and efficiency of ship propulsion systems, reduce the level of vibrations and related negative consequences.