When designing a hydraulic system or selecting hydraulic cylinders, the cylinder’s mounting type is an important detail that cannot be ignored. It will affect how loads are transferred throughout the system and how the cylinder performs in actual operating conditions. This article will introduce hydraulic cylinder mounting types and help you make an appropriate choice.
Why Do Hydraulic Cylinder Mounting Types Matter?
Affects Load Transfer and Cylinder Performance
Different hydraulic cylinder mounting types are designed to handle forces in different ways. Some mounting styles allow the cylinder to pivot with machine movement, while others are suitable for fixed linear force applications.
Choosing a mounting style that matches the motion path of your equipment helps make sure that loads are transmitted efficiently and safely.
Helps Reduce Side Loading Risks
Side loading is one of the most common causes of premature hydraulic cylinder wear. When a hydraulic cylinder is subjected to forces not aligned with its design direction, the piston rod, guide component, and sealing system all experience additional stress.
Selecting the correct hydraulic cylinder mounting type can help minimize these forces and improve service life.
Simplifies Long-Term Maintenance
Understanding hydraulic cylinder mounting styles during the design phase can help you optimize the equipment layout and enhance the convenience of maintenance in the later stage.
If you are developing new machinery or purchasing replacement cylinders, confirming mounting requirements in advance can help avoid installation problems, reduce modification costs, and improve the overall lifecycle performance of your hydraulic system.
Types of Hydraulic Cylinder Mounts
Pivot Mounts
The pivot mounts allow the hydraulic cylinder to swing or rotate at a specific angle as the load moves during operation. This can reduce the influence of side loading on the hydraulic cylinder.
Clevis Mount
The clevis mount is one of the most widely used pivot mounting methods. It connects the cylinder to the machine through a pin and clevis structure, allowing the cylinder to rotate within a single plane as the equipment moves.
Because the cylinder can pivot during extension and retraction, the clevis mount helps keep the load always transmitted along the axis of the hydraulic cylinder. Therefore, it is widely used in construction equipment, agricultural machinery, material handling systems, and dump trucks.
Clevis-mounted hydraulic cylinders offer a good balance between load capacity, installation flexibility, and manufacturing cost. If your machine includes booms, lifting arms, tilting frames, or other articulated structures, you can give priority to the clevis mount solution.
Common Materials for Clevis Mount Components
In industrial and mobile equipment, clevis brackets are commonly manufactured from welded carbon steel or high-strength alloy steel. While the pivot pins are typically made of hardened steel to withstand repeated loading and wear.
Limitations
Before choosing the clevis-mount hydraulic cylinder, you should thoroughly evaluate the movement path and force direction of the equipment. It may not be the best choice for equipment that constantly bears large side loading or is subjected to multi-directional forces.
Trunnion Mount
The trunnion mount is commonly used in applications that require the cylinder to pivot while bearing large loads. Unlike the clevis mount, this mounting style supports the cylinder through trunnion pins positioned on the head, cap, or center section of the cylinder body, allowing the cylinder to rotate with the machine movement.
- Head trunnions are used where the load is applied closer to the rod end, while cap trunnions provide support from the rear of the cylinder.
- Center trunnions position the pivot point near the cylinder’s center of gravity. You can use it for long-stroke cylinders and applications that require balanced load distribution.
The advantage of the trunnion mount is that it can achieve a better load distribution under long stroke and high load conditions. You can use it in scissor lifts, material handling equipment, industrial machinery, and other applications with high requirements for structural stability.
Common Materials for Trunnion Mount Components
Because the trunnion mount undergoes repeated loading cycles, the trunnion pins are usually made of heat-treated high-strength alloy steel to improve wear resistance. The trunnion supports and cylinder mounting brackets are commonly produced from welded carbon steel or structural steel capable of handling dynamic loads in industrial equipment.
Limitations
Although trunnion mounts are very suitable for heavy-duty applications, they require more accurate mounting alignment than clevis mounts. If the position of the trunnion supports is improper, or the machine structure cannot provide sufficient support, the cylinder body may bear additional bending loads, thereby affecting the long-term operational performance and service life.
If you are designing new equipment or replacing an existing hydraulic cylinder, it is important to evaluate the load path and trunnion location before determining the mounting plan.
Spherical Bearing Mount
The spherical bearing mount is used for applications where alignment cannot be maintained for a long time. By adopting a spherical bearing at the mounting point, the cylinder can compensate for angle deviations, thereby better adapting to the constantly changing loads during operation.
This mounting style is widely used in construction equipment, agricultural machinery, mining equipment, and other heavy-duty applications. If your equipment operates in harsh conditions for extended periods or the load direction frequently changes, a spherical bearing mount can help reduce the impact of additional stress on hydraulic cylinder components.
Common Materials for Spherical Bearing Components
To withstand repeated oscillating loads, spherical bearing assemblies are usually made of heat-treated bearing steel or high-strength alloy steel.
Depending on the specific operating conditions, you can also choose to equip them with corrosion-resistant coatings, self-lubricating liners, or wear-resistant materials to improve durability and reduce maintenance requirements.
Limitations
The structure of spherical bearing mounts is more complex, and they also have higher costs and maintenance requirements. If your device operates under stable loading conditions with accurate alignment, the spherical bearing may not be necessary. Simpler mounting styles are more economical and easier for you to maintain.
Fixed Mounts
Fixed mounts refer to a mounting method where the hydraulic cylinder remains rigidly connected to the equipment, without swinging around the mounting point during operation.
Flange Mount
Among fixed hydraulic cylinder mounting types, the flange mount is one of the most widely used solutions for applications requiring high rigidity and precise linear motion. The cylinder is directly fixed to the machine through the flange connected at the head or cap end of the cylinder.
Since the cylinder is rigidly mounted, force can be directly transmitted along the cylinder centerline. This makes flange-mounted hydraulic cylinders can be used for hydraulic presses, injection molding machines, manufacturing equipment, and other industrial systems that have high requirements for linear motion control.
If the movement trajectory of your equipment is fixed and there is almost no angle variation, flange mounting can provide a stable supporting effect and a high force transmission efficiency.
Head, Cap, Intermediate Flange Mount
According to the mounting position, it can be classified as head, cap and intermediate flange mount.
- In the head flange mount, the flange is mounted on the head end of the cylinder near the rod side. This directly transfers the load to the equipment support structure. When your equipment requires high rigidity and positioning accuracy, such as hydraulic presses, forming equipment, and automated production systems, the head flange mount is a common choice.
- Cap flange mount positions the flange at the rear end of the cylinder and is supported by the rear structure of the equipment. This mounting method is more common when the equipment’s space layout is limited or when rear support is easier to achieve.
- An intermediate flange mount places the flange near the middle section of the cylinder body. This mounting style can improve load distribution and reduce bending effects on long cylinders. If you are selecting a long-stroke hydraulic cylinder, the intermediate flange configuration can provide better support.
Common Materials for Flange Mount Components
Because flange mounts are designed to transfer large forces into the machine frame, flange plates are usually made of structural carbon steel or high-strength alloy steel.
Limitations
The flange installation has a low tolerance for angle changes and installation deviations. If your equipment experiences structural deflection or load direction change during operation, additional stress may be directly transmitted to the hydraulic cylinder and mounting structure.
Side Lug Mount
The side lug mount is suitable for applications where the installation space is limited and convenient fixation is required. The mounting lugs are connected to the side of the cylinder and directly fixed to the machine frame using bolts.
The advantage of the side lug mount hydraulic cylinder is its flexible installation. Since the mounting point is located on the side of the cylinder, you can more easily integrate the cylinder into the existing structure without the need to add large mounting brackets or make big modifications to the frame.
The side lug mounts are commonly used in material handling equipment, manufacturing machinery, and other applications where cylinder movement follows a fixed linear path. If you are designing equipment with limited mounting space, this hydraulic cylinder mounting type can provide a good balance between structural simplicity and installation efficiency.
Common Materials for Side Lug Components
Since the mounting lugs transfer cylinder forces directly into the machine frame, they are typically manufactured from structural carbon steel or high-strength alloy steel. In heavy-duty applications, lug plates are often strengthened to improve fatigue resistance and long-term bearing capacity.
Limitations
The side lug mount is more sensitive to mounting alignment. Because the mounting surface is offset from the cylinder centerline, improper installation can generate additional bending moments on the cylinder body and mounting structure.
If you are selecting a side lug mounted hydraulic cylinder, it is important to make sure that the load is always well aligned with the cylinder centerline throughout the stroke.
Foot Mount
Foot mount fixes the cylinder to the equipment through bottom support feet. The mounting feet are located below the cylinder and connected to the machine frame through bolts. The structure is simple and easy to install and maintain.
Since the hydraulic cylinder is directly fixed on the mounting surface, you can reduce the number of mounting components and simplify the overall structure. Foot mounts are commonly used in industrial machinery, manufacturing equipment and material handling systems.
Common Materials for Foot Mount Components
The mounting feet are also manufactured from structural carbon steel or high-strength alloy steel. Under heavy load conditions, the mounting feet are usually welded to reinforced end caps or adopt integral structures to improve load-bearing capacity and fatigue resistance.
Limitations
The mounting points are located below the force line. If the alignment cannot be maintained correctly, additional bending moments may be generated. Therefore, the foot mount hydraulic cylinder typically has higher requirements for installation accuracy and an external guiding structure.
Applications of Different Hydraulic Cylinder Mounting Types
| Mounting Type | Typical Industries | Common Applications | Best Suited For |
| Clevis Mount | Construction Equipment, Agriculture, Material Handling | Excavators, Loaders, Dump Trucks, Agricultural Implements, Lifting Arms | Applications where the load moves through an arc and the cylinder needs to follow changing angles |
| Trunnion Mount | Industrial Machinery, Lifting Equipment, Heavy Manufacturing | Scissor Lifts, Industrial Presses, Rotating Machinery, Long-Stroke Systems | Long-stroke cylinders and heavy-duty equipment requiring balanced load distribution |
| Spherical Bearing Mount | Mining, Forestry, Construction | Excavators, Wheel Loaders, Mining Machinery | Equipment exposed to frame flexing, uneven terrain, or changing load directions |
| Flange Mount | Manufacturing, Metal Forming, Plastics Processing | Hydraulic Presses, Injection Molding Machines, Production Lines, Forming Equipment | High-force linear motion applications requiring precise alignment and maximum rigidity |
| Side Lug Mount | Automation, Packaging, Material Handling | Conveyor Systems, Packaging Equipment, Assembly Machinery, Industrial Automation Systems | Applications with limited installation space and stable linear load paths |
| Foot Mount | General Manufacturing, Processing Equipment, Custom Machinery | Lifting Platforms, Processing Equipment, Conveyor Machinery, Stationary Industrial Systems | Equipment with sufficient external guidance and a well-supported mounting surface |
Common Hydraulic Cylinder Mounting Codes
Hydraulic cylinder mounting codes are standardized codes used to indicate specific installation forms. You can quickly confirm installation requirements with suppliers and improve communication efficiency through this short code.
If you need to purchase hydraulic cylinders from multiple suppliers, installation codes can help you quickly determine whether the mounting type is suitable for your application.
| Mounting Code | Mounting Type |
| MP1 | Clevis Mount |
| MT1 | Head Trunnion Mount |
| MT2 | Cap Trunnion Mount |
| MT4 | Center Trunnion Mount |
| MF1 | Head Flange Mount |
| MF2 | Cap Flange Mount |
| MS2 | Side Lug Mount |
| MX1 | Foot Mount |
How to Pick a Mounting Style for Your Hydraulic Cylinder?
Confirm the Equipment Movement Path
First, you should determine whether the hydraulic cylinder needs to follow a changing angle during operation. If the equipment has oscillation, hinging, or arc-shaped motion, pivot-style hydraulic cylinder mounting types are more suitable.
Clevis mount, trunnion mount and spherical bearing mount can accommodate angle changes and help reduce the impact of side loading on the hydraulic cylinder.
If your hydraulic cylinder moves along a fixed straight path and there is almost no angle variation, you can choose the fixed mounting type of hydraulic cylinder.
Evaluate Load Direction and Side Loading Risk
When the force is transmitted along the centerline, the hydraulic cylinder has the optimal working state. Side loading caused by misalignment, frame deformations, or changes in load direction can accelerate the wear of piston rods, guide components, and seals.
If your device may experience uneven loading, you can choose a mounting type with certain automatic compensation capabilities, such as spherical bearing mounts.
Consider Cylinder Stroke and Machine Structure
The cylinder stroke and machine structure can also influence your mounting selection. If the long-stroke hydraulic cylinder lacks sufficient support, it is more likely to generate bending forces. You can choose trunnion mounts or intermediate flange mounts. They can help distribute loads more reasonably and improve structural stability.
For devices with limited installation space, a side lug mount can achieve flexible installation without modifying the device structure.
Balance Performance, Maintenance, and Cost
Spherical bearing mounts can compensate for misalignment, and trunnion mounts can improve load distribution. However, these advantages are not necessary for all devices.
If your equipment can operate stably for a long time and maintain good alignment, using a simpler hydraulic cylinder mounting type can reduce your costs and improve maintenance efficiency.
FAQ
Can the Mounting Type of the Existing Hydraulic Cylinder Be Changed?
In some cases, it is possible. This depends on the structure of your hydraulic cylinder, the force conditions of the equipment, and the installation space. Before making changes, you need to confirm that the new mounting type will not alter the original force path and will not create additional stress on the cylinder or the equipment structure.
Are Hydraulic Cylinder Mounting Standards Universal?
Not entirely universal. Hydraulic cylinders may be manufactured according to different standards, such as ISO, NFPA, or manufacturer’s custom specifications. If you plan to replace the hydraulic cylinder, you should check the mounting dimensions and interface parameters in advance to avoid installation compatibility issues.
How to Quickly Identify the Mounting Type of a Hydraulic Cylinder?
You can first observe the connection structure between the hydraulic cylinder and the equipment. Features such as clevises, trunnions, flanges, side lugs, or mounting feet can often help you determine the mounting type. The most accurate method is to consult the equipment drawings or the manufacturer’s technical documentation.
Is It Better to Use a Unified Mounting Type for Multiple Devices?
For manufacturing companies with multiple device models, unifying hydraulic cylinder mounting types can reduce the variety of spare parts and simplify the procurement process. This also helps you improve maintenance efficiency.
Should the Mounting Type Be Considered Before Selecting the Hydraulic Cylinder?
It is suggested that you consider it simultaneously. The cylinder diameter and stroke are usually the parameters that are determined first. Installation requirements can also affect the size of the hydraulic cylinder, the layout of the equipment, and the space for later maintenance.
Final Thoughts
The appropriate hydraulic cylinder mounting type can reduce costly equipment structure modifications and downtime risks in the later stage. If you are choosing the hydraulic cylinder mounting type for your project, please feel free to contact us to obtain professional selection advice and customized hydraulic cylinder solutions.
