A friction drive system is a type of mechanical drive system that relies on the frictional force between two surfaces to transmit power. In these systems, the drive is typically provided by a rotating roller or wheel that makes contact with another surface, such as a conveyor belt or a roller within a conveyor system. The friction between the surfaces allows for the transfer of motion and power without the need for gears or chains. This method is particularly useful in applications where a smooth and controlled movement is required, such as in conveyor systems used in manufacturing, warehousing, and distribution centers.