*Universal Joints are mainly used to make a flexible connection between two rigid shafts at an angle.

*It is used to connect propeller shaft and gearbox shaft and to provide between propeller shaft and gear box during transmission of rotary motion.

*A universal joint  is a joint or coupling in a rigid rod whose axis are inclined to each other, and is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft.