1. Introduction
This manual provides comprehensive instructions for the safe and efficient use of the SAM SDA50x50 Pneumatic Double Acting Compact Air Cylinder. It covers product specifications, installation procedures, operational guidelines, maintenance recommendations, and troubleshooting tips. Please read this manual thoroughly before installation and operation to ensure proper function and longevity of the product.
2. Safety Information
Always observe the following safety precautions to prevent injury and damage to equipment:
- Ensure the air supply is disconnected and pressure is relieved before performing any installation, maintenance, or repair work.
- Wear appropriate personal protective equipment (PPE), such as safety glasses, during installation and operation.
- Do not exceed the specified rated pressure of 1.0 Mpa (145 psi).
- Ensure all connections are secure and leak-free to prevent sudden pressure loss or component failure.
- Do not modify the cylinder or its components. Use only genuine replacement parts.
- Operate the cylinder within its specified temperature range of -20°C to 80°C (-4°F to 176°F).
- Keep hands and other body parts clear of moving parts during operation.
3. Product Overview
The SAM SDA50x50 is a compact, double-acting pneumatic air cylinder designed for various automation applications. Its robust construction ensures reliable performance in industrial environments.
3.1 Key Features
- Compact structure for space-saving installations.
- Double-acting design for controlled extension and retraction.
- Hardened and wear-resistant inner cylinder diameter for enhanced durability.
- Suitable for applications such as hydraulic presses, engraving machines, automatic door controls, and drilling machines.
3.2 Components
The SDA50x50 cylinder consists of a main body, piston, piston rod, end caps, and air ports. The double-acting design means air pressure is used to extend and retract the piston rod.

Figure 1: Front view of the SAM SDA50x50 Pneumatic Cylinder, showing the piston rod and air ports.

Figure 2: Close-up view of the cylinder's air ports and piston rod connection point.

Figure 3: Rear view of the cylinder, highlighting the mounting holes for secure installation.
4. Specifications
Detailed technical specifications for the SDA50x50 model:
| Parameter | Value |
|---|---|
| Model Number | SDA50x50 |
| Bore Size | 50 mm |
| Stroke | 50 mm |
| Rated Pressure | 1.0 Mpa (145 psi) |
| Peak Pressure | 1.5 Mpa (217.5 psi) |
| Piston Speed | 30~800 mm/S |
| Operating Temperature | -20°C to 80°C (-4°F to 176°F) |
| Interface Diameter | 1/4 inch |
| Item Weight | 10.6 ounces (approx. 300g) |
| Manufacturer | SAM |

Figure 4: Technical drawing illustrating dimensions and connection points for SDA series compact cylinders.

Figure 5: Comprehensive table detailing various dimensions and specifications across different bore sizes for SDA Double Acting Compact Cylinders.
5. Setup and Installation
Proper installation is crucial for the cylinder's performance and safety.
- Mounting: Securely mount the cylinder using the designated mounting holes. Ensure the mounting surface is flat and rigid enough to withstand the forces generated by the cylinder. Refer to Figure 3 for mounting hole locations.
- Air Supply Connection: Connect a clean, dry, and regulated air supply to the cylinder's 1/4 inch interface ports. Use appropriate pneumatic fittings and tubing. Ensure all connections are tight to prevent air leaks.
- Control Valve: Connect a suitable 5/2-way or 4/2-way directional control valve to manage the air flow to the cylinder's two ports for double-acting operation.
- Load Connection: Attach the load to the piston rod using appropriate mechanical linkages. Ensure the load is aligned with the piston rod's axis to prevent side loading, which can cause premature wear or failure.
- Initial Check: Before applying full pressure, slowly introduce air to check for proper movement and any leaks.
6. Operation
The SDA50x50 is a double-acting cylinder, meaning air pressure is applied to alternate sides of the piston to achieve both extension and retraction.
- Extension: To extend the piston rod, apply pressurized air to the rear port (typically the port further from the piston rod end) while allowing air to exhaust from the front port.
- Retraction: To retract the piston rod, apply pressurized air to the front port (typically the port closer to the piston rod end) while allowing air to exhaust from the rear port.
- Speed Control: Piston speed can be adjusted using flow control valves installed in the air lines. The cylinder supports a piston speed range of 30 to 800 mm/S.
- Pressure: Operate the cylinder within the rated pressure of 1.0 Mpa. Exceeding this pressure can lead to damage or reduced lifespan.
7. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your pneumatic cylinder.
- Air Quality: Ensure the air supply is clean and dry. Use an air filter and dryer to prevent moisture and contaminants from entering the cylinder, which can cause corrosion and seal damage.
- Lubrication: If the air supply is not lubricated, consider using an in-line lubricator to provide a fine mist of oil to the cylinder. Consult the system's pneumatic diagram for lubrication requirements.
- Leak Checks: Periodically check all pneumatic connections for leaks using a soapy water solution. Tighten any leaking fittings.
- Visual Inspection: Regularly inspect the piston rod for scratches, dents, or corrosion. Check for any signs of wear on the cylinder body or mounting points.
- Seal Replacement: Over time, seals may wear out. If you notice reduced performance or air leaks from the piston rod area, the internal seals may need replacement. This typically requires disassembly by a qualified technician.
8. Troubleshooting
Refer to the following table for common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Cylinder does not move or moves slowly |
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| Air leaks from cylinder body or piston rod seal |
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| Erratic or jerky movement |
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9. Warranty and Support
For warranty information or technical support, please contact the manufacturer or your authorized distributor. Keep your purchase receipt and product model number (SDA50x50) handy when contacting support.
Manufacturer: SAM
For further assistance, please refer to the official SAM website or contact their customer service department.