Screw conveyors can be divided into  screw conveyors and shaftless screw conveyors. For example, it is easy to wind and clog the granular and powdery materials. Wet and paste materials have to choose shaftless screw conveyors. The biggest performance characteristic of the shaftless screw conveyor is that it adopts a non-central shaft design and utilizes an integral steel screw pushing material with certain flexibility.

Before selecting the screw conveyor, we must first determine the nature of the material we are transporting, whether it is a shaftless screw conveyor or an axial screw conveyor. If it is some winding, easy to plug the material (such as sewage treatment, kitchen waste) must choose the shaftless screw conveyor. Shaftless screw conveyor material selection, its blades are generally thicker. You can choose ordinary carbon steel, you can also choose good wear resistance 16 manganese steel, in some corrosion-resistant conditions we must also choose the stainless steel blade. The shaftless screw conveyor has a wear sleeve inside the shell.