Vertical Screw Carrot Destoner. Approx. Hopper capacity: 10 cubic ft. (74.8 gallons). Screw diameter: 1 ft. 4 in. Screw length: 11 ft. 11 in. Sterling electric motor, 2 hp, 1150 rpm, 230/460 V, 6.8/3.4 amps, 60 Hz, 3 phase. Pulley ratio: 6.3. Final rpm: 182.5. The screw destoner can be used in conjunction with all root crops. The integration of this system into a processing line dRam Industriesatically reduces the potential for extreme wear and tear to associated equipment further along the installation. The screw destoner is constructed with a wedge reception hopper with a vertical transport screw. The screw is driven by a motor pulley system. Inlets: (1) 4 ft. L x 2 ft. 8 in. W open top hopper, (1) 1 in. MNPT port (hose). Outlet: (1) 1 ft. 4 in. L x 1 ft. 2 in. W port, (3) 3 in. MNPT ports. Overall dimensions: 4 ft. 10 in. L x 4 ft. 5 in. W x 13 ft. 6 in. H. (BB).