http://www.kunweimachine.com/s....crew-conveyor/shaftl
Product Description

The tubular shaftless screw conveyor, also known as a shaftless spiral conveyor, is a type of material handling equipment that is used to transport bulk materials without a central shaft. The tubular shaftless screw conveyor is composed of screw without central shaft, tubular casing,lining plate, motor and gearbox, bearing, inlet and outlet.