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Experienced technical team and innovative CNC equipment provide customers with high-quality products, fast delivery and reasonable prices. Through continuous technological innovation and improvement, to achieve continuous improvement of product quality.
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The factory has more than 60 sets of machining equipment, including: laser cutting equipment, sheet metal bending and stamping equipment, CNC milling machines, CNC precision turning equipment, grinding machines, CNC 5-axis machining, spark machines, large gantry milling machines and other high-precision processing equipment.
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The products cover the fields of industrial automation, semiconductors, medical care, aerospace, exploration, industrial machinery manufacturing, machine tool industry, rail transit, automation equipment, construction machinery, medical equipment, logistics equipment, environmental protection equipment and other fields.
Pneumatic cylinder, also known as air cylinder, is a mechanical device which uses the power of compressed gas to produce a force in a reciprocating linear motion. Like in a hydraulic cylinder, something forces a piston to move in the desired direction. The piston is a disc or cylinder, and the piston rod transfers the force it develops to the object to be moved. Engineers sometimes prefer to use pneumatics because they are quieter, cleaner, and do not require large amounts of space for fluid storage.
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![SE Series Standard Cylinder]()
SE Series Standard CylinderThe SE series adopts a double Y-shaped one-way seal with automatic compensation function, significantly reducing the starting pressure and extending the sealing life. The square aluminum tube designread more -
![SC Series Standard Cylinder]()
SC Series Standard CylinderThe SC series standard cylinder is a widely used rod type pneumatic actuator in the field of industrial automation. With its core advantages of compact structure, high reliability, and modularread more -
![SA Series Standard Cylinder]()
SA Series Standard CylinderThe SA series standard cylinder is a high-performance pneumatic actuator designed specifically for industrial automation, following international standards such as ISO 15552, with high precision,read more -
![DNC Series Standard Cylinder]()
DNC Series Standard CylinderThe DNC series standard cylinder is a high-performance pneumatic actuator designed specifically for industrial automation, which complies with the ISO 15552 international standard and combines highread more -
![HLF Series Slide Cylinder]()
HLF Series Slide CylinderThe HLF series sliding table cylinder is an ultra-thin, high-precision linear motion driving component designed specifically for automation scenarios with limited space and strict requirements forread more -
![MSQB HRQ Series Rotary Cylinder]()
MSQB HRQ Series Rotary CylinderThe MSQB/HRQ series rotary cylinder is a high-precision and highly reliable pneumatic drive component designed specifically for automation scenarios that require rotational motion. The core principleread more -
![RMTL Series Rodless Cylinder]()
RMTL Series Rodless CylinderThe RMTL series rodless cylinder is a magnetic coupled precision guide rod type linear drive component, which adopts a design of transmitting power through magnetic coupling between the piston andread more -
![RMT Series Rodless Cylinder]()
RMT Series Rodless CylinderThe RMT series rodless cylinder is a magnetic coupled linear drive component that transmits power through magnetic coupling between the piston and an external slider, without the need for traditionalread more -
![RMS Series Rodless Cylinder]()
RMS Series Rodless CylinderThe RMS series rodless cylinder is a magnetic coupled linear drive component that achieves rodless design through magnetic coupling between the piston and external slider, eliminating the traditionalread more -
![OSP Series Rodless Cylinder]()
OSP Series Rodless CylinderThe OSP series rodless cylinder is a modular, highly integrated linear drive component designed specifically for the needs of space saving, load capacity improvement, and motion accuracy inread more -
![DGC-K Series Rodless Cylinder]()
DGC-K Series Rodless CylinderThe DGC-K series rodless cylinder is an innovative linear drive component designed specifically for compact, high-precision, and long stroke automation scenarios. It breaks through the traditionalread more -
![MU Series Multi Position Fixed Cylinder]()
MU Series Multi Position Fixed CylinderThe MU series multi position free installation cylinder is a precision drive component designed for space limited, multi-directional installation, and flexible layout. With the core advantages ofread more
Advantages of Pneumatic Cylinder
Speed and Precision
Pneumatic cylinders excel at providing rapid and precise motion control. Whether it's moving a conveyor belt, controlling a robotic arm, or operating a packaging machine, these cylinders offer exceptional speed and accuracy. This enables manufacturers to optimize their production processes, leading to higher throughput and improved product quality.
Cost-Efficiency
Compressed air, the driving force behind pneumatic cylinders, is often readily available in industrial settings. This makes pneumatic systems cost-effective to implement and operate. Unlike some alternatives, pneumatic systems require minimal infrastructure and are relatively easy to maintain, translating into lower overall costs.
Safety and Reliability
Safety is a paramount concern in industrial environments. Pneumatic systems are inherently safer than some other power sources, such as electricity or hydraulics, as they do not pose the same risk of electrical shock or fluid leakage. Additionally, pneumatic cylinders are known for their reliability, with a long service life and minimal downtime, which is crucial for maintaining productivity.
Versatility
One of the standout features of pneumatic cylinders is their adaptability to a diverse range of industrial tasks. Manufacturers can choose from a wide variety of pneumatic cylinders, including compact cylinders, ISO standard cylinders, NFPA interchangeable cylinders, rotary cylinders, rodless cylinders, and even specialty made-to-order units. This versatility allows them to tailor their automation solutions to suit specific applications.
Simple Integration
Integrating pneumatic cylinders into existing industrial setups is typically straightforward. Their simplicity of design and standardized interfaces make installation and maintenance relatively hassle-free. This means that manufacturers can quickly implement pneumatic systems without significant downtime or costly modifications.
Energy Efficiency
In an era where energy conservation is a top priority, pneumatic systems shine. They are inherently energy-efficient since they only consume compressed air when in use, allowing for precise control of energy consumption. Furthermore, modern pneumatic components are designed with energy-saving features that reduce air consumption, making them an eco-friendly choice.
Clean and Contamination-Free
Pneumatic systems are ideal for industries where cleanliness and contamination control are critical, such as food processing and pharmaceuticals. Since they rely on compressed air, there is no risk of hydraulic fluid contamination. This ensures that products remain uncontaminated and safe for consumption.
Types of Pneumatic Cylinder
Double-Acting Cylinders
In double-acting cylinders, compressed air can be introduced on both sides of the piston. The piston and rod assembly will move toward the side of the chamber with less internal pressure. Hence, the piston and rod assembly can perform both extension and retraction strokes. The piston and rod assembly returns to its original position by supplying pressurized air on the other side of the cylinder.
Single-Acting Pneumatic Cylinders
In single-acting pneumatic cylinders, a spring is fitted around the piston rod, which aids in the retraction of the piston and rod assembly. Compressed air enters through one of the cylinder caps and fills only one side of the chamber. This causes the piston and rod assembly to move linearly and extend in one direction while compressing or stretching the spring.
Rodless Pneumatic Cylinders
Rodless pneumatic cylinders move loads along with a piston driven by compressed air. The piston is attached to a carrier where the load is mounted. The piston moves the carrier in a straight line. The direction of the piston movement is always to the side of the chamber with lower internal pressure.
Air Hydraulic Cylinders
Air hydraulic cylinders replace the driving force of oil with air. When activated, the piston in one chamber moves linearly until it is stopped which activates the air power system. Air flows into the piston chamber. As the air pressure builds, the piston in the chamber moves linearly in reverse to compress the oil in the working area.
Multi Force Multiplying Pneumatic Cylinders
Multi Force Pneumatic cylinders have cylinders with identical profiles placed in a series with an internal air passage for all pistons. They have a common piston rod with multiple pistons attached. The output force is increased in accordance with the number of pistons, which can be 2, 3, or 4 pistons with a force output of 2, 3, or 4 times the force output of a single piston pneumatic cylinder.
Rotary Cylinders
Rotary cylinders, or pneumatic rotary actuators, are used to convert energy from compressed air into an output torque. They use rotary motion to drive devices in tight spaces and are small double acting cylinders that exert force in a clockwise and counterclockwise direction. The piston rod has a rotary profile against a worm wheel to provide linear movement.
Tandem Cylinder
A tandem pneumatic cylinder, also known as a combination cylinder, is similar to a multi force multiplying cylinder and has two pistons connected by a single rod that supply twice the force. The two components of a tandem cylinder are separate double acting cylinders connected in a series. They are used in limited space applications where higher force is needed.
Telescopic Pneumatic Cylinders
Telescopic cylinders have a series of segmented tubes that extend when compressed air fills the cylinder. These tubes progressively decrease in diameter. The tube with the smallest diameter is referred to as the piston rod. Telescopic cylinders have exceptionally long strokes. The tubes consume small space when they are nested together or when the cylinder is in a retracted position.
Industrial Automation
Pneumatic cylinders are extensively used in industrial automation for tasks such as material handling, packaging, assembly, and sorting. They can push, pull, lift, lower, and clamp objects in manufacturing processes.
Machine Tools
Pneumatic cylinders are integrated into machine tools for operations like workpiece clamping, tool changing, and controlling the movement of cutting tools. They help in achieving precise positioning and rapid tool changes.
Automotive Industry
Pneumatic cylinders are used in car manufacturing for tasks like welding, painting, and assembling components. They provide controlled movement and force for consistent and efficient production processes.
Automotive Industry
Pneumatic cylinders are used in car manufacturing for tasks like welding, painting, and assembling components. They provide controlled movement and force for consistent and efficient production processes.
Conveyor Systems
Pneumatic cylinders are utilized in conveyor systems to control the movement of products along assembly lines or distribution centers. They can stop, start, divert, and align items on the conveyor belts.
Packaging Machinery
Pneumatic cylinders play a role in packaging equipment by assisting in the sealing, labeling, and stacking of packages. They ensure accurate and repeatable movements in these processes.
Material Handling
Pneumatic cylinders are used to manipulate and position materials in warehouses, distribution centers, and factories. They can lift and move items to different locations, aiding in the logistics and storage of goods.
Food and Beverage Processing
Pneumatic cylinders are used in food and beverage processing for tasks like sorting, filling, capping, and labeling containers. They maintain a clean and hygienic environment while handling products.
Aerospace Industry
Pneumatic cylinders are found in aerospace applications for functions such as deploying landing gear, controlling flaps and rudders, and opening and closing cargo doors in aircraft.
Medical Equipment
Pneumatic cylinders are used in medical equipment like hospital beds, surgical tables, and patient lifts. They enable smooth and controlled movement of various components, ensuring patient comfort and safety.
Construction Equipment
Pneumatic cylinders are employed in construction equipment such as cranes, excavators, and concrete pumps. They assist in lifting heavy loads and performing various tasks on construction sites.
Printing Industry
Pneumatic cylinders are essential components in printing machinery for tasks like paper feeding, ink distribution, and press plate movement. They contribute to achieving high-quality and consistent printing results.
Textile Industry
Pneumatic cylinders are employed in textile machines for actions like yarn tensioning, fabric cutting, and needle movement in sewing machines. They ensure precise and controlled movements in textile processes.
Components of Pneumatic Cylinder
Pneumatic Cylinder Bore
The pneumatic cylinder bore houses and protects the internal components. It is closed by two end caps: the front-end (cylinder head) and the rear-end (cylinder cap). The front-end cap is located adjacent to where the piston rod extends while the rear-end cap is mounted on the opposite side. One or both caps have ports that introduce pressurized air inside the bore. Seals with cushioning capability are placed between the bore and the caps to prevent leakage and high impact during actuation.
Piston
The piston is the disc inside the pneumatic cylinder, which serves as a movable partition that divides the chamber. It reciprocates back and forth in a straight line. As compressed air enters the port of the rear-end cap, it exerts pressure on the piston, which causes it to move away from the rear-end cap and for the piston rod to protrude. This movement is called positive or plus movement and the pressurized chamber which causes this movement is called the plus chamber. The minus chamber is located on the opposite side. The piston then returns to its original position. The manner of how the piston returns to its original position depends on its type. The amount of force generated by the pneumatic cylinder is equivalent to the air pressure multiplied by the area of the piston. The diameter of the pneumatic cylinder refers to the diameter of the piston or the inner diameter of the cylinder.
Piston Rod
The piston rod is connected and driven by the piston. It is attached to the machine element or objects to be pushed or pulled. The stroke length refers to the distance that the piston and the piston rod have traveled.
Piston Cushioning
The piston cushioning lowers the speed of the piston and rod assembly before it reaches the end cap. It helps to reduce impact, noise, and vibration at the end of every stroke and enables the piston to move at faster velocities.
Piston Static Seal
The piston static seal ensures an airtight sealing between the piston and the rod.
Piston Seal
A piston seal ensures an airtight sealing between the piston and the chamber. It prevents air from leaking to the other side of the chamber.
Piston Guide Rings
Piston guide rings prevent direct metallic contact between the piston and the cylindrical chamber during sliding motion. They absorb radial forces acting in the cylinder. They are mounted in the piston and made of chemical resistant, low friction, and self-lubricating plastics such as PTFE and polyamide.
Sensors
Sensors are used to detect the linear position of the piston inside the cylinder. They are important for positioning applications. Reed switches and Hall-effect sensors are the commonly used pneumatic cylinder sensors.
Tie Rods
Tie rods are the threaded steel rods that hold the end caps to the pneumatic cylinder bore. A static seal is present between the end cap and bore interface. The tie rods run around the length of the cylinder. A pneumatic cylinder can have 4-20 tie rods depending on the size and force it produces, which makes the cylinder bulkier. The tie rods also protect the cylinder from possible impact and shock.
How Pneumatic Cylinders Work
Similar to how an engine works in a car, a pneumatic cylinder works by forcing gas or air into a cylinder, which will move a piston after a certain amount of pressure is reached. The piston is attached to another mechanism that performs the desired function of the machine.
There are two different types of pneumatic cylinders. The first is a single acting cylinder. This cylinder has one valve for air which is used to enter the cylinder which is turn pushes the piston in one direction.
The piston is then returned by either a spring device or a load on the piston when air pressure is removed.
The second type of cylinder is called a double acting pneumatic cylinder, which consists of multiple air valves. Once air is forced into the cylinder, similar to a single acting cylinder, it will push the piston in one direction. The air then can be removed through a different valve which creates a vacuum that pulls the piston in the opposite direction.
9 Signs Your Pneumatic Cylinders Need Replacing
Sluggish Or No Actuation
If your cylinder is moving too slowly, or not moving at all, it's a clear sign that something’s wrong. Failure to actuate or sluggishness probably means that there’s insufficient air pressure to run the system. Check the actuating pressure and find out why it’s inadequate, otherwise it might lead to a complete system breakdown.
Low Or Unstable Air Pressure
Insufficient compressed air supply may indicate that your compressor isn’t large enough to handle all your equipment. You may suffer spikes in demand if your cylinders are sharing a circuit with other tools or machines. It’s also possible that the air filter from your compressor is blocked and needs cleaning.
Actuation Requires Excessive Air Pressure
If the level of air pressure needed to actuate your cylinder is higher than normal, it could indicate that pressure in the pilot control is too low. This could be because the control line isn’t big enough or a failure of the metering choke valve.
Intermittent Start-Up
This may be a sign that your air cylinders are overloaded or overworked. Seals will suffer higher friction and stress, while rod ends may bend or even break. This will cause the whole actuator to fall apart. Erratic start-up may also be due to pressure spikes if you’re using devices for absorbing energy or speed control.
Inconsistent Stroke
This can be a knock-on effect of cylinders moving at variable or slow speeds, either through inadequate airflow or because your cylinder is incorrectly sized for the stroke. It may also be that your tubing and valves are undersized and are restricting the airflow, so you need to check that they’re all according to spec.
Erratic Cylinder Speed
Cylinders can move too quickly or too slowly if you have no flow controls, or aren’t using them properly. Make sure that flow controls are correctly located, making it impossible for operators to change the flow rates and interfere with cylinder speed control.
Hissing Sounds
If you hear your air cylinder hissing, it’s a clear sign of a leak. This can be caused by damaged or worn-out components such as the piston or rod seals. You’ll experience pressure loss and a noticeable decline in cylinder performance. Check all components and replace any worn or damaged parts.
Cylinder Banging Or Pulsing
Your cylinder should run smoothly with very little noise. If you hear banging when you power up the system, it’s possible that the cylinder was left in a retracted position when the air was shut off. The next time you power up, there’ll be a sudden rapid inrush of air. Not only will you hear a loud bang but the operation will start up too abruptly, which is potentially dangerous. You can avoid this by using soft-start valves. Loud actuation may also occur if you have no stroke-end cushioning or flow controls.
Visible Corrosion Or Wear
If you can physically see damage on your pneumatic cylinder, it probably means that it’s working in a harsh environment. You may find pitting, erosion or rust if it’s exposed to chemicals, high temperatures or humidity. This type of damage will compromise the structural integrity of your cylinder, which will eventually fail.
Typical Causes of Pneumatic Cylinder Failure
If your pneumatic cylinder is failing, the most likely culprit is side loading. When pressure is applied laterally to the axis it can cause a number of problems that will ultimately result in failure including uneven or accelerated piston rod and bearing wear, seal failure, and cylinder tube scoring, among others. Sideloading usually occurs because the pneumatic cylinder has been installed incorrectly into the system in which it operates. Once sideloading does happen, repairs should be made quickly to ensure more damage does not occur.
If you want to avoid any problems with your pneumatic cylinder, be sure to maintain proper lubrication at all times. The seals within the cylinder require thorough and constant lubrication or else they will dry out and fail.
Another factor that could lead to pneumatic cylinder failure is contamination. Contaminants can restrict free movement within the cylinder by blocking the operating parts. This will not only reduce the overall functionality of the cylinder but also potentially lead to total system failure. Contaminants like particulate matter, oil, water, and others, are often easily introduced into the pneumatic cylinder, either through the operating environment or the pneumatic air supply, and always with catastrophic results.
Any system with more than one pneumatic cylinder requires perfect synchronization of each component in order to work effectively. In order to maintain the synchronization of a complex system like this, there are a number of practices and methods in place that require careful monitoring and management. In the event that the pneumatic cylinders fall out of synchronization, the machine will stop functioning properly and most likely the entire system will fail. If this does occur, immediate pneumatic cylinder repair should be made.
Cylinder failure is inevitable when you're operating it outside of the intended, optimal performance range. Exceeding these limits means the cylinder is exposed to excessive loads that stress the internal components of the cylinder. This leads to poor performance and almost always a premature failure. Preventative checks and maintenance can help you operate within the correct parameters and avoid this issue.
5 Guidelines For Selecting Pneumatic Cylinders
Cylinder Arrangement
Rod style cylinders can be designed in two ways – single, or double acting. Single acting cylinders supply compressed air to only one side of the piston, thus creating force and motion only in one direction. Double acting cylinders supply compressed air to create enough force to extend as well as retract strokes. Single acting cylinders have limited extension due to the presence of a compressed spring in the design. The stroke length for double acting cylinders is unlimited, but the piston rod can bend or buckle after consistent use over a period of time.
Cylinder Types
Two primary types of pneumatic cylinders are compact, and guided. Compact cylinders are designed for light duty applications with less space and small stroke requirements. Guided cylinders provide precise motion solutions, and are used in heavy duty applications, where a guided, or large offset load is required.
Force Output
The amount of force that a cylinder creates is also a guideline for selecting pneumatic cylinders. This can be established by examining the cylinder’s bore size, and air pressure. A general rule of thumb used here is, the force generated by the cylinder should twice as much as the load.
Cylinder Speed
It is important to know the stroking speed of a cylinder. Factors that affect speed, such as port sizes, inlet and exhaust flow through control valves, and hose or tubing sizes should also be considered. Also, look at cylinders that have flow controls at the cylinder ports.
Cylinder Air Consumption
Pneumatic cylinder air consumption takes place due to two factors. The first is the volume of air that the piston displaces during operation. The second is contaminated air volume that passes through the valves, ports, tubing, and end cover cavities. Customers should check whether the cylinder can supply air even in worst case conditions.
Our Factory
Dongguan Hung Hsin Automation Technology Co., LTD with more than 15 years of development experience, Focus on CNC machining of precision parts,is an enterprise specializing in the design and manufacturing of mechanical accessories, hardware accessories and various types of high-precision parts.The "Shunyida" brand cylinders and guide rails independently developed and produced have been affirmed and recognized by the industry. The factory has more than 60 sets of machining equipment, including: laser cutting equipment, sheet metal bending and stamping equipment, CNC milling machines, CNC precision turning equipment, grinding machines, CNC 5-axis machining, spark machines, large gantry milling machines and other high-precision processing equipment.
Ultimate FAQ Guide to Pneumatic Cylinder
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