Choosing the Right Hydraulic Cylinder for Your Application

Hydraulic cylinders are the workhorses of a hydraulic system. Their smooth and uninterrupted action is vital to provide the necessary power for the efficient performance of any hydraulic powered machinery. From industrial presses to scissor lifts, and heavy duty excavators to assembly line precision equipment, hydraulic cylinders are indispensable for various industries including manufacturing, construction, agriculture, heavy machinery, and more.

Hydraulic cylinders come in many types. The right selection of hydraulic cylinder for the intended application is crucial for its efficient, reliable, and durable performance. This guide will walk you through the factors to consider while choosing the appropriate hydraulic cylinder.

Operation of a Hydraulic Cylinder

Before we get into selection factors, we need to gain an understanding of what hydraulics cylinders are and how they function. Hydraulic cylinders, also called actuators in hydraulic cylinder terminology, are components of a hydraulic system that help convert hydraulic energy into mechanical energy.

Hydraulic energy is created by applying pressure to a hydraulic fluid, which the cylinder’s action changes to mechanical force. To do this the hydraulic cylinder, which consists of a piston and a piston rod housed within a cylindrical barrel, moves linearly under the pressure of the hydraulic fluid, creating the desired force. The mechanical force so created is then applied in a controlled and repeated manner to power various machines.

Hydraulic Cylinder Selection Guide

Now that we have understood what hydraulic cylinders do, we will go through the factors that need to be considered while making a selection.

1. Application Requirements

Hydraulic equipment have different requirements based on the application. Take careful note of the following requirements for your machinery:

• Type of Application: Hydraulic equipment are capable of performing different operations such as lifting, holding, lowering, pushing, pulling, pressing, and more. Identifying the exact application is a crucial step in selecting the right actuator.

• Load Capacity: Every hydraulic cylinder is designed to exert a certain amount of force. This is called the machine’s maximum load capacity. For example, the load capacity of a 10 Ton vertical baling press would be different from that of a 50 Ton press, and the hydraulic cylinder operating each will be configured accordingly.

• Stroke Length: In hydraulic cylinder terminology, stroke length is defined as the complete range of extension of the piston rod. Identifying the precise stroke length for your equipment is very important to ensure better stability, prevent damage, and improve efficiency.

• Precise Measurements: Find out the precise hydraulic cylinder measurements for your equipment and compare them to the hydraulic cylinder specifications provided by the manufacturer. In addition to stroke length, check the bore size, and the rod diameter as well. These will ensure perfect compatibility with your equipment, optimizing output and preventing mechanical failure.

2. Mounting Style

If your hydraulic application requires a mount, determine the mounting style and calculate the dimensions that it requires. Mounts determine how the cylinder will be installed, thus providing greater stability and flexibility in its performance. The most common types of mount include pivot mount, flange mount, and Clevis mount.

3. Type of Cylinder

Hydraulic cylinders come in different types, depending on their specific application. Identifying the correct type helps optimize performance.

• Single-acting Cylinders: In these cylinders, hydraulic fluid exerts pressure in one direction, with the return motion provided by either a spring or simply gravity. They are commonly used in devices like dump trucks and road blockers.

• Double-acting Cylinders: In these cylinders, hydraulic fluid exerts pressure in both directions for extension and retraction. They provide more control over the operation. They are widely used in equipment like car lifts  and vertical baling presses.

• Tie-rod Cylinders: These cylinders are suitable for high-pressure environments like manufacturing presses and horizontal baling presses, which require strong cylinders for efficient compression.

• Telescopic Cylinders: These cylinders are designed for equipment that require smooth, extended reach, height adjustment, and stability such as scissor lifts.

• Cushioned Cylinders: These cylinders have in-built dampers that reduce impact during operation and are ideal for devices such as wheelchair lifts that require smooth and steady movement.

4. Operating Pressure

A hydraulic system works under tremendous pressure. The pressure range that the hydraulic cylinder is designed to work within is known as its operating pressure. Study the operating pressure specifications of the cylinder you are considering to ensure that works within the limits prescribed for your equipment for safe and efficient performance.

5. Working Environment

Many hydraulic machineries work in extremely harsh conditions. Factors such as temperature, humidity, contamination, and corrosion can degrade the quality of the cylinder and seals, resulting in increased friction, fluid leaks, and faster wear and tear. These factors can lead to lower efficiency, damage, and safety issues. Choose cylinders  with appropriate temperature ratings and check for special anti-corrosion coating, and high quality seals that can prevent dust, debris, and moisture from entering the system.

6. Material and Seal Type

The materials used for the cylinder and its seals are very important to ensure performance and durability. Choose stainless steel as it highly robust and has excellent anti-corrosive properties. If you prefer a strong, lightweight system, aluminium is a good choice. Check that the seals, which may be made of polyurethane, rubber, or Teflon, are compatible with the hydraulic fluid and working conditions.

Additional Considerations

• Maintenance and Repair

Check whether the hydraulic cylinder you are considering can be easily maintained or repaired. This will save time and costs in the long run. Also ensure that original, high quality replacement parts are readily available with the supplier.

• Budget

Ensure that you have sufficient funds allocated for high quality, reliable, and compatible components. Compromising on these to save costs might turn out to be an expensive proposition later.

• Manufacturer’s Reputation

Thoroughly research the reputation and trustworthiness of the manufacturer. Ensure that they provide warranties, maintenance contracts, and fast and reliable aftersales service.

Conclusion

Making the perfect selection of hydraulic cylinder for your equipment is a process that should be undertaken with great care and thoroughness as it can have serious repercussions on the performance and longevity of your machinery. Carefully assess your application needs, study the manufacturer’s specifications, and test compatibility factors. Consult experts if you are unsure about any factor, and always prioritize quality over cost.

About SAB TECH

SAB TECH is a trusted manufacturer and supplier of high quality hydraulic solutions for wash & lifting, waste & recycling, perimeter protection, and loading systems. SAB TECH’s high tech facilities are involved in research, design, and development of superior quality hydraulic cylinders for a wide range of equipment. They also provide advanced honing services for repairing damaged hydraulic cylinders. All their products and components are backed by warranties and prompt after sales service.

Get in touch with their highly knowledgeable technical staff today to learn more about how to select the right hydraulic cylinder for your application.