... 2.Inlet flange,ball joint and bags are optional screw conveyor :1.168,219,273,323,407mm in diameter 2.Inlet ... flange,ball joint and bags are optional 3.long lifescrew conveyor :cAdvantagesA) High quality motor and gear box, with heavy duty ... bearing, end bearing, splined shaft coupling,so easy to install,C) Simple structure,low cost,strong tightness,safe and convenient operation ...