A screw conveyor, also known as an auger conveyor, is a mechanism that uses a rotating helical screw blade, or "flighting," within a tube to move liquid or granular materials. Widely used in bulk handling industries, screw conveyors efficiently transport semi-solid materials like food waste, wood chips, aggregates, cereal grains, animal feed, and more.

These conveyors typically consist of a trough or tube with a spiral blade, either coiled around a shaft or as a "shaftless spiral," driven from one end. The material transfer rate is directly proportional to the shaft's rotation speed, making screw conveyors ideal for variable rate feeding in industrial processes. They can operate horizontally or at an incline, making them a cost-effective solution for elevating and conveying materials when space permits.

Screw conveyors, rooted in the ancient Archimedes' screw design, continue to be a versatile and reliable choice for modern material handling needs.