Mixer with an auger in the pipe, Vinnytsia region.

The shape and performance of the screw is determined by the physical properties of the material fed into the spiral conveyor.

1. A solid screw consists of a feather welded spirally to a pipe. There is always a small gap between the edge of the ego and the body. This type is used to transport highly mobile materials.(//tractor-service.com)
2. The tape screw also has a pipe as its base, but a wide tape is mounted on it by means of intermediate ribs. Such an auger provides a high speed of dosing and prevents the material from sticking to the parts. That allows it to be used for moving thick, viscous powders and lumpy cargo.
3. A belt screw without a central axis is used for transporting complex viscous mixtures, heterogeneous or artificial materials. The name speaks for itself, illustrating the difference from the previous variety.
4. Blade screws are installed on conveyors that, in addition to transporting the product, mix it.
5. Special screws have an individual feather shape, specially designed for moving materials with high adhesion and poor mobility.