Drum-type grain cleaners are used for rough cleaning of grains. They have two parts: 1) An aspiration system that separates dust from grains using air channels. This part is optional. 2) A drum sifting system that classifies grains into 5 parts using a drum with reverse-motion paddles and sifting holes. Drum cleaners come in various models with drum diameters ranging from 630mm to 1250mm and capacities of 50-200 tons per hour. They efficiently remove debris from grains while minimizing noise and vibration during operation.