What phrase best describes the role of counterweights in crane operation?

Counterweights play a critical role in ensuring the crane's stability during lifting operations. When a crane lifts a load, it creates a moment or torque that can potentially cause the crane to tip over. The counterweights are strategically placed on the crane to provide a counteracting force against this moment, helping to maintain balance. By adding weight in the opposite direction of the load being lifted, counterweights lower the center of gravity and increase the overall stability of the crane. This is essential for safe crane operation, especially when lifting heavy or off-center loads.

While factors like lifting speed, wear on components, and electrical balance are important aspects of crane operation, they do not directly relate to the primary function of counterweights. Their main purpose is specifically tied to maintaining stability to prevent accidents and ensure safe lifting practices.