The rotor of a progressive cavity pump is a helical, screw-shaped component that  rotates inside a stator. It creates sealed cavities that transport fluid from the inlet to the outlet as it turns.
                                 
Material: Usually made of strong metals like steel to withstand stress.
                                 
Function: The rotor maintains a tight seal against the stator, ensuring a consistent and smooth flow of various fluids, including viscous materials.
                                 
Operation: As the rotor rotates, it moves the fluid forward without changing the cavity size, resulting in minimal pulsation and shear forces.