Compared with the regular single-rod cylinder, the dual rod air cylinders(or double rod pneumatic cylinder) have a certain anti-torsion and anti-side load capacity, which can effectively prevent the rotation of the cylinder piston rod. Common dual rod air cylinders include TN, CXS, and STM series.
Guided pneumatic cylinder adds another guided rod on the basis of the single rod or double rod cylinders to make the movement trajectory of the cylinder more accurate, which can effectively increase the performance of resisting side load and reduce the influence of lateral swing. Most regular guided air cylinder is MGP series.
In the field of modern industrial automation, pneumatic systems have the advantages of rapid response, simple structure, and low cost, and are widely used in various types of mechanical equipment. There are various types of pneumatic actuators, and the dual rod guiding cylinder plays an important role in solving piston rod displacement, positioning errors, and enhancing load-bearing capacity due to its excellent guiding performance and high repeatability.
Double rod guided air cylinder is a type of cylinder that adds double guide rods and guiding mechanisms to traditional cylinders. Its design aims to enhance the lateral support and torque resistance of the piston rod during linear motion, ensuring that the piston can maintain stable and smooth operation even in high load and high-precision working environments. Suitable for automation systems that require smooth pushing and pulling movements, precise positioning, and a certain tolerance for off load or side load
Both dual rod air cylinder and guided air cylinder have a magnetic ring inside, which is convenient for the magnetic switch to detect the position of the piston movement. There are mounting holes on three sides of the fixed plate of double rod air cylinder and guided pneumatic cylinder, which are convenient for multi-directional installation and use.
Double rod guided air cylinder is a common pneumatic actuator, characterized by two parallel piston rods connected to the piston inside the cylinder, and extending from both sides of the cylinder to connect the externally slider to connect and transmit loads. The extension and retraction of the piston rods are determined by the direction of the compressed air enter.Compared with traditional single rod cylinders, double rod cylinders have the following advantages.
Symmetrical thrust and tension
Due to the same area on both sides of the piston, the forward and reverse thrust after intake are consistent, making it suitable for symmetrical loads or bi-directional equal force applications.
Superior bending and torsion resistance performance
The dual piston rod structure provides stronger resistance to lateral forces and is suitable for working conditions with certain lateral loads or eccentric forces.
High guidance accuracy and smooth movement
The piston rod is supported in both directions, providing more stable movement and higher precision in repeated positioning.
Suitable for clamping, pushing, and symmetrical mechanisms
Commonly used in applications such as fixture driving, positioning guidance, and synchronous pushing in automation equipment.
Double rod guiding cylinders are almost always double acting in practical applications. Before understanding their specific working process, let's first introduce their structural composition.
Cylinder body: including cylinder body, cylinder head, sealing ring and other parts, it is the working chamber for compressed air.
Double piston rod: Two parallel arranged rods connect the piston and slider to achieve stable linear guidance.
Piston: Installed in the cylinder body, it is the core component of pneumatic drive.
Sliding block: connected to two piston rods, it is the output end, bearing loads and executing actions.
Guided bearing: provides precise guidance for the piston rod, reduces friction, and ensures motion accuracy.
Intake driven piston movement
When compressed air enters the cylinder from one side of the air port, it pushes the piston to move in the opposite direction, and the movement of the piston drives the two piston rods to move forward or backward.
The piston rod drives the slider to move in a straight line
The piston rod is rigidly connected to the slider, so when the piston rod moves, the slider also moves accordingly. Due to its double bar structure, the slider is constrained in two directions to prevent displacement or rotation.
Guidance and anti torsion
The double piston rod, in conjunction with the guide sleeve or bearing on the slider, provides precise guidance. The slider will not experience twisting or swinging issues like a regular single rod cylinder, ensuring its parallel, stable, and strong resistance to twisting linear motion.
Reversing action
When the directional solenoid valve directs the air source to the other side of the air port, the piston moves in the opposite direction and the slider moves in the opposite direction, achieving reciprocating motion.
Single rod cylinder: With only one piston rod and simple movement, it has two modes of single acting and double acting, suitable for linear propulsion scenarios with light loads and low precision requirements.
Double rod cylinder: equipped with two parallel piston rods, connected to the output through a slide block in the middle. This structure provides additional stability and directionality. Suitable for linear propulsion scenarios with heavy loads and high precision requirements.
In a double rod guided air cylinder, the slide block is not just a connecting component, it is the core driving and stabilizing structure of the entire guiding system. Its existence determines the motion accuracy, load-bearing capacity, and service life of the cylinder. It will give the dual rod cylinder the following four advantages:
Precise guidance to prevent deviation
Anti torsion, maintain load posture
Enhance load bearing capacity
Extend cylinder life
◆ Working pressure: 0.15~0.7MPa
◆ Ambient temperature: -20~70℃
◆ Applicable fluid medium: Compressed air, non-corrosive gas
◆ Operating speed: 50-500mm/s
◆ Clamping and positioning system
◆ Push pull and transport
◆ Heavy load linear drive
◆ Precision assembly equipment
◆ Testing and measuring equipment
◆ Packaging and labeling machinery
◆ Conveyor and Sorting System
Correctly installing the dual rod guiding cylinder is the key to ensuring its smooth operation, extending its lifespan, and maintaining positioning accuracy. Due to its structure with dual piston rods and slider guide system, special attention should be paid to alignment, fixation, load connection, and other aspects during installation.
Fokca(Fescolo) offers a range of customization options to provide cylinder solutions tailored to diverse application needs. In the realm of dual rod and guided cylinders, Fokca's customization services cover flexible adjustments to stroke length, the application of special material coatings for enhanced corrosion resistance, and reinforced designs to increase load capacity. These customization possibilities not only improve the performance and durability of the cylinders but also adapt to the specific demands of particular industries or unique operating environments. This ensures that Fokca’s products stand out from standard offerings, providing customers with more precise and efficient pneumatic solutions.
What are Maintenance Tips to Extend Lifespan?
Keep the gas source clean and dry,Regularly check the lubrication status of the slider and guide rod,Avoid overload or unbalanced load,Regularly tighten bolts and check for looseness,Check the buffer mechanism and sealing components
Brand Comparison: SMC and Alternatives?
SMC offers high precision, long service life, and a complete range of models. Other options include brands like Festo, known for industrial-grade reliability, and Airtac, which offers cost-effective solutions suitable for general-purpose applications.
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