What is a hydraulic cylinder?

A hydraulic cylinder is a linear actuator that is used to apply force to a part or to lift and move heavy parts. Any hydraulic unit that is made of a plunger or piston and works inside a cylindrical chamber by fluid under pressure is called a cylinder. Actuators are used in the hydraulic system to convert fluid power under pressure to mechanical power, in other words, the actuator is a device that converts hydraulic power to mechanical power.