Floating hydraulic cylinders

What are floating hydraulic cylinders?

A floating hydraulic cylinder is a type of hydraulic actuator that is not rigidly fixed to its mounting point or the load it drives. Instead, it uses a non-rigid mounting method, allowing the cylinder to "float" or pivot.

The main purpose of this design is to compensate for misalignment. In many machines, the trajectory of the load and the mounting point of the hydraulic cylinder are not perfectly parallel or stationary. The floating design allows the cylinder to pivot and self-align, preventing the destructive forces known as side loads.

Side loads are one of the main causes of premature hydraulic cylinder failure because they place immense stress on the piston rod, seals, and bearings, leading to leaks and piston rod bending.

Floating Hydraulic Cylinder Technical Parameters

Floating Hydraulic Cylinder Advantages

• Engineered with a space-saving design for easy integration into compact spaces and tight equipment layouts.

• Built using high-strength materials combined with specialized heat treatment and welding processes to ensure long-lasting durability and structural integrity.

• Fitted with high-performance imported seals from leading brands such as NOK, Hallite, and Parker, providing reliable leak-proof performance and global interchangeability.

• Optional surface treatments include hard chrome plating, laser cladding, QPQ, and high-frequency quenching, tailored to specific operational or environmental requirements.

• Suitable for a broad operating temperature range from -40°C to +120°C, with custom solutions available for more extreme conditions.

• Compatible with various accessories including hydraulic locks, explosion-proof valves, and custom valve blocks to enhance system functionality and safety.

• Incorporates an internal buffering mechanism to ensure smooth and controlled movement during both extension and retraction.

• Offers multiple mounting interface standards including metric, imperial, and American to ensure compatibility with diverse global systems.

Applications Of Floating Hydraulic Cylinder

• Mobile and Construction Equipment: This is the most common application. The boom, arm, and bucket cylinders on excavators, loaders, and bulldozers are all mounted using U-pins and pivot pins to allow for "floating" to accommodate multi-axis arc motion.
• Scissor Lifts and Aerial Work Platforms: The main lifting cylinders typically use trunnion mounts or spherical bearings to accommodate the complex forces and deformations generated when the platform is raised.
• Telescopic Arm Synchronous Control: Automatically compensates for length changes during the telescoping process;Ensures smooth and synchronized movement of multiple arm segments; Maintains structural alignment under varying load conditions
• Load Compensation: Adapts to structural deformation caused by different load weights; Reduces stress concentration at the extension arm position; Provides stable platform support during dynamic motion
• Alignment Compensation: Adapts to manufacturing tolerances and wear of the arm structure; Prevents jamming in complex telescoping systems; Maintains optimal force distribution, ensuring even stress on all mounting points

How to select a suitable floating hydraulic cylinder?

Determine the Mounting Type: This is the most critical factor.

1. U-pin Mount (Pin Eye): The base has a U-pin, and the rod end has a pin eye. Allows for simple single-axis pivoting. Best suited for arc motion.
2. Trunnion Mount: The cylinder body is connected with two pivots (trunnions), allowing the entire cylinder to swing. This is ideal for long-stroke applications that require supporting the cylinder's own weight.
3. Spherical Bearing: This is the most powerful type, typically integrated into the "eyes" at the cylinder head and piston rod ends. They can compensate for multi-axis misalignment (e.g., when the load is simultaneously pivoting and slightly twisting). They are the ultimate solution for preventing side loads.
4. Quantify the Misalignment: How much will the load pivot? Is it a few degrees of arc motion (U-pin) or complex multi-axis displacement (spherical bearing)?
5. Load and Force: Calculate the required force (cylinder bore) and pressure rating. Floating cylinders do not change these basic requirements.
6. Piston Rod End: The piston rod end is just as important as the base mount. Using a rigid piston rod end with a floating base mount is a common mistake. Ensure the rod end also has a U-joint, spherical bearing, or other pivot. Limit tube (long stroke): For horizontally mounted long-stroke cylinders, an internal "limit tube" (spacer) may be required to prevent the piston rod from sagging due to its own weight, which is a spontaneously generated lateral load.

Our Customer Review

"These hydraulic cylinders for aerial work platforms are perfectly suited for our aerial work equipment, and they operate reliably even in extreme weather conditions. We have used them extensively in outdoor environments, and they have consistently proven to be efficient and dependable. Their easy integration into our systems is a significant advantage for us." – Australian Customer

“These hydraulic cylinders have been a game-changer for us. They provide exceptional stability and control, even at full height. In our construction projects, reliability is critical, and these cylinders have exceeded our expectations without any performance issues.” – Canadian Customer

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