Hydraulic cylinder is a part of a machine's hydraulic system. hydraulic cylinder is a hydraulic actuator which creates linear movement by converting the hydraulic energy back to a mechanical movement. It can be likened to a muscle in that, when the hydraulic system of a machine is activated, the cylinder is responsible for providing the motion.

Hydraulic cylinder (also called a linear hydraulic motor) that is used to give a unidirectional force through a unidirectional stroke.It has many applications, notably in construction equipment (engineering vehicles), manufacturing machinery, elevators, and civil engineering.

Hydraulic cylinders are mainly used in earth-moving equipment such as excavators, back hoes and tractors to lift or lower the boom, arm, or bucket.These cylinders are also used in hydraulic bending machines, metal sheet shearing machines, particle board or plywood making hot press.