A screw conveyor is a conveyance device used for moving materials in a vertical, inclined, or horizontal direction. It is also known as an auger conveyor or a spiral conveyor. This type of conveyor is commonly used in industries such as agriculture, mining, and chemical processing. Some synonyms for the term "screw conveyor" include helical conveyor, worm conveyor, and spiral screw conveyor. Other similar types of conveyers include bucket conveyors, drag conveyors, and belt conveyors, with each having its own unique design and function. Regardless of the type of conveyor used, their main purpose is to transport materials efficiently and safely to their desired destination.