Harvesting is a crucial stage of crop production, and the efficiency of this process determines the yield and profitability of the farming business. One of the significant concerns during harvesting is rotor loss, which can lead to a decrease in yield and an increase in harvesting costs. In this article, we will discuss what rotor loss during harvesting is, when and how it happens, its disadvantages, and how to prevent it. We will also explain how Estes concaves can stop rotor loss.