Adjustment during operation is not necessary because of its constant and stable separating performance. Compact design and large capacity mean that installation space for a given separating capacity is very small. Machine automatically stops when the tank is nearly empty. Samples of brown rice can be taken from a special outlet by diverter valves, for easy inspection of quality and flow rate. The discharge side is covered with a transparent cover so that the separating conditions of the grain are easily checked. Flow rates are adjusted by a manual remote lever on “0” model and by increase / decrease buttons on “DR” model.