What are compact pneumatic cylinders and how do they function?
Compact pneumatic cylinders are finely engineered actuators that convert compressed air into linear movement while occupying very little space, which makes them well suited for demanding automation tasks in tight installation areas. Short-stroke cylinders are built for setups where space is at a premium, delivering dependable and efficient motion control. Thanks to their low weight, small size, and sturdy build, they are a key choice in applications that demand both durability and high performance.
Different types of compact pneumatic cylinders
ISO compact cylinders
Manufactured to meet ISO 21287 requirements, these compact cylinders provide dependable performance and can be seamlessly incorporated into systems across global markets. They are widely used in industries such as packaging, automation, and food production.
Key benefits include:
- Standardised dimensions that make installation and integration straightforward
- A robust construction capable of performing reliably in diverse industrial environments
Example product: The SMC C55 Series offers full ISO compatibility and comes in a broad selection of stroke lengths.
Compact cylinders with pre-mounted valves
These space-efficient cylinders feature built-in valves, which simplify pneumatic system design and reduce installation time. Their main benefits include:
- The integrated valve design minimises extra piping, contributing to a more compact system overall
- Streamlined connections enable more consistent and efficient operation
Example product: The CVQ Series from SMC combines a solenoid valve directly with the cylinder, creating an ultra-compact unit that enhances overall efficiency.
Free mount cylinders
Designed with adaptable mounting options, these cylinders simplify installation and integration into more advanced systems. Their main benefits include:
- Multiple sides can be used for direct mounting
- Optimised for confined areas that need varied installation orientations
Example product: Featuring a compact rectangular form, the SMC CU Series is ideal for applications that require direct mounting.
Compact cylinders with linear guides
These compact linear actuators include integrated guides that handle lateral forces and maintain precise motion, making them a strong fit for applications where stability and high accuracy are essential. Their key benefits include:
- Non-rotating function that enables accurate, guided movement
- Enhanced load capacity, allowing their use in fields such as robotics, medical technology, and CNC machinery
Example product: With an integrated linear guide, the SMC MXZ Series ensures precise and reliable motion control.
Compact cylinders with lock unit
These cylinders feature an integrated locking mechanism that keeps the piston fixed in position, making them ideal for applications requiring accurate and dependable position holding. Their main benefits include:
- An integrated locking feature that secures the piston’s position
- Ideal for applications where holding the position is necessary without maintaining continuous air pressure
Example product: The SMC RLQ Series combines built-in air cushioning with a locking mechanism to deliver secure, stable performance in demanding applications.
Typical applications for compact cylinders
Pick-and-place equipment: These cylinders enable precise, efficient movements within automated material-handling processes. Equipment with tight installation areas: An effective choice for systems that require compact actuators without compromising on performance. Robotics and robot arms: Their reduced size and weight help enhance the precision and stability of robotic equipment. By lowering inertia, these cylinders enable robot arms to operate more quickly and with greater accuracy during tasks like material handling, assembly work, and fine positioning in automated systems.Benefits provided by SMC’s range of compact cylinders
- Compact design: Engineered to take up as little space as possible, simplifying installation and enabling integration even in highly confined applications.
- Customisation: A wide array of mounting choices, rod adaptations, and environment-specific variants, including options designed to resist welding spatter.
- Global standardisation: ISO-approved designs that allow easy integration with systems used worldwide.
How to choose the correct compact air cylinder?
Selecting compact air cylinders for any application requires assessing a number of key factors:
- Bore diameter and stroke length: Both values determine the cylinder’s travel distance and the force it can produce. They must be chosen based on the movement needed and the force required for the application.
- Mounting configurations: Choose a mounting option that fits the design and spatial constraints of your system. Compact cylinders offer numerous mounting arrangements to provide maximum installation flexibility.
- Load stopping impact: Assess the loads the cylinder will encounter, including any impact as it reaches the end of its travel. If necessary, add shock absorbers to ensure smoother operation and protect parts or workpieces from potential damage.
- External forces: Consider any external forces that may affect the cylinder’s operation, such as side loads or other influences that could impact its overall performance.
- Operating speed and airflow: Identify the speed the application requires and ensure that the pneumatic circuit can supply sufficient air to maintain steady, reliable performance.
- Environmental factors: Account for conditions such as moisture, dust, or significant temperature variations. Choosing components suited to these environments will help maximise the cylinder’s durability and service life.
Ensuring clean, well-regulated air supply and following proper maintenance guidelines are essential for reliable performance and long-lasting pneumatic systems.
Unsure which compact cylinder is the right match for your application? Reach out to our experts for personalised support.