There are two basic options in the design of hydraulic cylinders. The choice between the two is more than just a preference; it also has to do with the type of application, the specific mounting and design options of the equipment as well as other factors specific to the application.
The two options in cylinder design include tie rod and welded hydraulic cylinders. The difference is immediately apparent when looking at a hydraulic cylinder, which makes the two very easy to identify.

Tie Rod Hydraulic Cylinders

A tie rod cylinder is so named for the rods that are used to hold the two cylinder end caps on the cylinder body. The rods, which are usually four in number but can be any number to accommodate the size of the cylinder body and end caps, run along the outside of the cylinder.

The tie rods pass through the end caps and are tightened to hold the cylinder together against the internal pressure within the cylinder body.
Typically, these cylinders are used for light or medium duty types of operations and applications. The rods add to the diameter of the cylinder and need to be considered when designing equipment or when replacing cylinders.

Welded Hydraulic Cylinders

All welded hydraulic cylinders have the end caps welded directly onto the cylinder body. This creates a more streamlined cylinder without the addition of the external tie-rods. Additionally, there are no end cap seals required, which eliminates the need to check and replace these components on the tie rod cylinders.

As with any cylinder, it is crucial to match welded hydraulic cylinders with the system requirements. These cylinders are usually rated for all-purpose types of uses and offer a wide range of bore and pressure options.

Always choose hydraulic cylinders from a reputable manufacturer. Top quality construction in welded cylinders ensures a long, trouble-free duty cycle for any type of application.