screw elevator conveyor, small farm grain conveyor grain suction machine Tel: 0086 15537339361 Eml: info@efficientchina.com Grain suction conveyor uses revolving screw to move the conveyor material in fixed casing,the bearings of head and tail are moved to shell,hanger bearing adopts sleeve bearing,which have dust proof sealing device,bearing bush usually adopts powder metallurgy,convey concrete adopts felt bushing, hanger shaft and screw shaft are connected by slider.