A hydraulic cylinder china hydraulic cylinder is a mechanical actuator used to provide unidirectional force through a unidirectional stroke. Hydraulic cylinders are used in almost every sector and are available in a variety of configurations. Both main types of hydraulic cylinders are Tie-rod and Welded. Each of these cylinder types can have unique applications due to their styles. Tie-rod cylinders are often installed in light to medium duty applications and tend to be designed to be repaired or re-loaded if necessary. Welded cylinders are made for most applications and are more complex in design but are generally more difficult to correct due to the welded design. Welded cylinders are usually a better solution due to their compact design so when a more robust style is important within an application.