Motorized drum pulleys are powered devices around which conveyor belts are wrapped.
Idler Drum Pulley
Idler drum pulleys are non-powered devices around which conveyor belts are wrapped.
Spiral pulleys have a spiral feature that comes in contact with the belt. They can be added to a drum pulley or a wing pulley. Spiral pulleys help to reduce the material build-up between the belt and the pulley face.
Wing pulleys are used to drive or support belts that ride on segments instead of a continuous surface.