Pin Joints are applicable for food products applications in which the coupling rods are used without bushes for the coupling rod pins to ensure no ingression of bacteria. As of now no cover boot seal used to contain lubrication. The media itself acts as lubrication for the pin in the coupling rod.

Cardan UJ Joints superior to conventional gear and single pin & bush joints are employed to take up free angular movements, axial forces, torque loads prevail in progressive cavity pump, employing two sets of pins perpendicular to each other.