Selecting the right hydraulic hose is crucial for ensuring the safety, performance, and ...
Hydraulic cylinder, jack, or piston. Different names, but the definition remains the same. A hydraulic cylinder is a device that uses pressure generated in a hydraulic system to move a load. Given the wide variety of cylinders available, you should carefully consider your needs when selecting a cylinder for your application.
Cylinders are versatile products. They are used not only for lifting, but also for:
Properly defining your needs is the first step toward making a decision.
Hydraulic cylinders are used for a wide variety of applications. Many workplaces involve harsh conditions, extreme heat, or rugged environments like construction sites. Cylinders made from higher-quality materials and featuring special coatings offer enhanced corrosion protection. This makes them more durable and ideal for use in harsh conditions.
Knowing how much space you need for the actuator is important. The size of the actuator must be suited to the space where it will be used. There are specially designed actuators intended for use in confined spaces. These are low-profile actuators or pancake-style actuators.
Stroke is defined as the difference between the fully extended height and the fully retracted height of the cylinder. It is the distance between the top of the piston and the bottom of the stop ring. For applications requiring additional stroke, telescopic hydraulic cylinders are available, including low-profile versions. Stroke determines how far the cylinder will lift, push, pull, or move your load. When considering cylinder stroke, stay within 80% of the maximum stroke. This helps ensure better stability and prevents damage caused by overloading.
Hydraulic cylinders are available in single-acting and double-acting configurations. A single-acting cylinder uses hydraulic pressure to extend the piston rod and a return spring to return to its original position. A double-acting cylinder uses hydraulic force for both lifting and lowering. This provides significantly greater control and precision.
If your load needs to be held in place while performing work, a load-holding cylinder is the safe choice. Cylinders that hold the load eliminate the need for propping. There are cylinders that can be used for load holding; these are lockable cylinders.
Every hydraulic cylinder has a specific load capacity. There are general-purpose designs, which are the "basic" options, as well as heavy-duty cylinders with load capacities up to 1,000 tons. As with cylinder stroke, the 80% rule also applies to tonnage. Manufacturers always specify the maximum load capacity as the safe limit. However, best practice for cylinders encourages users to apply only 80% of the manufacturer’s limit.
If you’re looking for a cylinder for regular use, you’ll need one made from a material that will last for years. Steel cylinders are stronger than their aluminum counterparts. However, their main drawback is their weight, which can impose limitations. Aluminum cylinders are lighter and more manageable.
Some jobs require additional stability or precise positioning of the actuator. If your job is on the more complex side, you’ll need a hydraulic actuator with mounting holes or a threaded flange. The mounting holes are located at the bottom of the actuator base and can be secured to the surface you’re working on
For heavy loads, more than one cylinder may be needed. In this case, select a pump with sufficient oil capacity. It’s also worth considering a synchronized lifting system. A synchronized lifting system ensures even distribution of the load’s weight.
The design of a hydraulic cylinder with a bored piston rod allows for both pulling and pushing forces on both sides.
During lifting, it is sometimes difficult to achieve sufficient contact between the saddle and the load. When this happens, there is a risk of damaging the cylinder due to lateral loading—often without the user even realizing it. A larger contact area can be achieved by using tilting saddles. This is an option that helps extend the service life of the cylinders.
Before making your final choice, don’t forget to check whether the hydraulic pressure from the pump will be sufficient. If you need an upgrade, there are many different pumps to choose from. For example:
The choice of pump depends on the work you will be performing. Every situation is unique, and you must select a pump with the appropriate power for your tasks. Need help? Consult experienced professionals who are well-regarded in their field.
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