Browse By Letter

Search engineering dictionary:


Flexible Screw Conveyors

A screw conveyor moves solid or liquid material by moving it on the threads of the screw. The screw is usually located in either a trough or tube and is oriented at a slight incline or vertically. As the screw rotates, material clings to the screw surface and is transported up the shaft. The pitch of the screw - the linear distance is takes to complete one complete revolution around the shaft - determines how slowly or quickly the material progresses from one end to the next at a given shaft speed. In a flexible screw conveyer, the screw is manufactured from a flexible material. The advantage provided by a flexible screw is that it automatically self-centers within the tube, providing clearance between the screw and tube wall. As a result, the material being transported by the screw is less likely to get caught and damaged between the screw and the wall.