a grit classifier of the type used in a variety of industrial applications to separate grit or particulate matter from a feed slurry is disclosed , the grit classifier being unitarily - formed in one or two pieces of moldable plastic or plastic - like material which renders the grit classifier more easily and cost - effectively manufactured . the grit classifier of the present invention is also advantageously easy to transport to a site , thereby further reducing the costs of use . also disclosed is an auger beating assembly for use in the unitarily - formed grit classifier tank of the present invention which is simply structured and adaptable to any screw auger type or size .