... 2. Technical specification of Screw conveyor,hopper screw feeder, Lifting height : 2.5M-8.5M 3. Base Specification of Screw conveyor ... has the advantage of less occupying space , simplification working, saving manpower, improve working conditions, humanity and safety.Screw conveyor,hopper screw feeder ... workshop screw conveyor for unloading machines 10 tons/h vertical height 3 m