Raw Paddy/Grain at harvesting, threshing, natural drying & transportation process will be mixed with some impurities. Pre-cleaning is used to remove extra large impurities (such as large stone, large soil clods, hemp rope, straw etc.) from grain or raw paddy. It is used in receiving section of raw paddy to protect the rear equipments. Pre cleaner is a customized machine which is also used in flour mill for leaning extremely dirty wheat.