Are idler pulleys and fan hubs the same?

Idler pulleys and fan hubs are not the same; they serve different purposes in machinery. An idler pulley is used to guide and tension a belt in a drive system, often found in engines or conveyor systems. In contrast, a fan hub is a component that connects the fan blades to the motor, allowing the fan to rotate and provide airflow. While both are mechanical components, they have distinct functions in their respective systems.