Abstract: A rotary grinding mill is disclosed including a hopper for holding a product to be milled, a mixing chamber having a grain inlet and a separate air inlet for mixing grain and air prior to grinding, a grinding mechanism for grinding the grain and a discharge port for disposing of grain flour received from the grinding mechanism. Connected to the discharge port is a container separate from the grinding mill which may be used not only to collect ground product, but also to store the ground product for later use. In accordance with one aspect of the invention, the container is connected to the grinding mechanism by an arcuate connector for developing a helical flow path of air within the container. In accordance with another aspect of the invention, a motor which drives the grinding mechanism, and a rotor of the grinding mechanism, are structurally isolated from the grinding mill so as to minimize vibration and noise within the grinding mill.