When it comes to hydraulic cylinders, there are two basic options for the action of the cylinder. There are also two basic types of manufacturing options, those that are welded or tie rod cylinders.
Choices between these two variables will make a difference based on the specific application. Often, the welded single acting cylinder is the superior option, with several very good reasons to consider.
Welded and Tie Rod
A welded cylinder has the two caps or ends of the cylinder welded directly to the body. This provides a streamlined, sleek cylinder that is ideal for any application where there is limited space or where a strong, durable and reliable cylinder is a must.
The tie rod cylinder uses rods that run down the outside of the cylinder body to attach the two caps to each other. This adds considerable bulk and weight to the cylinder, which is always important to consider.
Single and Double Acting
The single acting cylinder has one port at the base of the hydraulic cylinder. When the operator engages the hydraulic pump, the oil moves through the hose, into the port and pushes the rod of the cylinder up to extend or lift.
The retraction of the rod occurs when the oil is no longer moving into the port, and the weight of the rod and the associated load pushes the rod back into the cylinder.
With the double acting cylinder, there are two ports, and the lower port works like the single action cylinder to push the rod up. The second port is used for the operator to engage downward pressure in the cylinder that allows for the controlled lowering of the rod rather than through the weight on the rod.
The ability to fit into small places, the reduced maintenance and the easy use and installation of the single acting cylinder make it the ideal choice for many different types of applications.
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