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The article discusses the methods of harvesting grain crops. The emphasis is placed on a separate method involving the use of roller harvesters. A variant of a roller harvester operating by batch technology is considered. The standard methodology of substantiation of optimal parameters and modes of operation of the harvester conveyor is analyzed. As a result, it was found that such a technique is not suitable for establishing the appropriate indicators of the conveyor of the batch header due to its technical and technological features. A particular technique for determining the optimal modes and parameters of the conveyor of a batch harvester is proposed and justified, taking into account its design and technological features and the possibility of minimizing grain losses, and in conclusion the results of its application are presented.