In a chain drive system, what happens to the speed of the driven shaft as the sprocket ratio (SR) increases?

In a chain drive system, the sprocket ratio (SR) is the ratio of the number of teeth on the driven sprocket to the number of teeth on the driving sprocket. As the sprocket ratio increases, this means that the driven sprocket has relatively more teeth compared to the driving sprocket.

This increase in the sprocket ratio leads to a decrease in the rotational speed of the driven shaft. Essentially, for every complete revolution of the driving sprocket, the driven sprocket only completes a fraction of that revolution due to having more teeth. Consequently, the output speed of the driven shaft decreases.

Therefore, as the sprocket ratio increases, the speed of the driven shaft decreases, making this the correct understanding of the relationship within the chain drive system.