C95SDB200-200: SMC C95 Series Standard Type Single-Rod Double-Acting Air Cylinder (Bore 200 mm, Stroke 200 mm, Basic Type Mounting, with Cushion, without Magnetic Switch)
2026-01-22
The C95SDB200-200 is a model from SMC Corporation Japan’s C95 Series of standard type single-rod double-acting air cylinders. It features a bore of 200 mm, a stroke of 200 mm, basic type mounting, pneumatic cushioning, and no magnetic switch. It is suitable for clamping, pushing, lifting, and other actions requiring high force and medium stroke in industrial automation equipment, serving as a common large-bore actuator in pneumatic systems.
I. Model Number Interpretation (According to SMC C95 Series Naming Rules)
- C95: C95 Series standard type cylinder, conforms to ISO6431/VDMA standards, large bore type, single-rod double-acting.
- S: Standard type cylinder, with cushion structure.
- D: Built-in magnet (for magnetic switch detection of piston position – optional for some models).
- B: Mounting style code. B indicates Basic Type (Foot mounting with tapped holes on both ends).
- 200: Bore size code. 200 indicates a 200 mm bore.
- 200: Stroke code. 200 indicates a 200 mm stroke.
II. Main Technical Specifications
| Parameter | Specification | Description |
|---|---|---|
| Series | C95 | C95 Series standard type cylinder, large bore, single-rod double-acting. |
| Bore Size | 200 mm | Cylinder inner diameter, determining output force. |
| Stroke | 200 mm | Distance the piston rod travels, suitable for medium-stroke applications. |
| Action Type | Double-Acting | Piston rod acts in both directions. Extension and retraction are driven by compressed air. |
| Mounting Style | Basic Type (Foot mounting with tapped holes on both ends) | Mounting form, facilitates fixed installation. |
| Cushion Type | Pneumatic Cushion | Both ends feature adjustable air cushions to reduce end-impact. |
| Built-in Magnet | None | No magnetic switch functionality; requires external sensor for position detection. |
| Applicable Fluid | Air | Working medium, suitable for pneumatic systems. |
| Operating Pressure Range | 0.05–1.0 MPa | Recommended working pressure range for proper cylinder operation. |
| Maximum Operating Pressure | 1.0 MPa | Maximum allowable working pressure. Exceeding this may cause damage. |
| Proof Pressure | 1.5 MPa | Pressure test rating for verifying cylinder pressure resistance. |
| Fluid Temperature Range | -10 to 60 °C | Fluid temperature range for proper seal function. |
| Ambient Temperature Range | -10 to 60 °C | Environmental temperature range for proper cylinder operation. |
| Lubrication Requirement | Non-lubricated | Does not require oil mist lubrication, simplifying the pneumatic circuit. |
| Piston Speed Range | 50–500 mm/s | Recommended piston speed range for optimal cylinder life and performance. |
| Port Size | 3/4 | Air port size for piping connection. |
| Port Thread Type | G | Port thread type, compatible with different piping needs. |
| Piston Rod Diameter | 40 mm | Piston rod diameter, determining anti-bending capability and output force. |
| Effective Piston Area (IN) | 30159 mm² | Area on the blind side (rodless side) for calculating thrust. |
| Effective Piston Area (OUT) | 31416 mm² | Area on the rod side for calculating pull force. |
| Theoretical Thrust IN (at 0.2 MPa) | 6032 N | Theoretical thrust at 0.2 MPa supply pressure. |
| Theoretical Thrust IN (at 0.3 MPa) | 9048 N | Theoretical thrust at 0.3 MPa supply pressure. |
III. Structure and Working Principle
1. Structural Composition
The C95SDB200-200 employs a standard single-rod double-acting cylinder structure, primarily consisting of:
- Cylinder Tube: High-strength aluminum alloy, surface anodized for corrosion and wear resistance.
- Piston: Aluminum alloy, surface chromate-treated. Includes piston seals and wear rings for improved guidance and durability.
- Piston Rod: Carbon steel, hard chrome-plated for corrosion and wear resistance. Rod end features external threads for easy load connection.
- End Covers: Aluminum alloy, contain cushion mechanism and seals. The rod end cover includes a rod bushing for improved guidance accuracy.
- Cushion Mechanism: Adjustable air cushions on both ends. Cushioning effect is regulated via needle valves to reduce end-impact.
- Seals: Made of materials like polyurethane, ensuring reliable sealing performance.
- Mounting Feet: Basic type mounting feet with tapped holes on both ends for secure fixed installation.
2. Working Principle
The C95SDB200-200 operates as a standard double-acting cylinder:
- Extension: Compressed air enters the blind side (rodless side), pushing the piston forward, extending the rod and producing thrust.
- Retraction: Compressed air enters the rod side, pushing the piston backward, retracting the rod and producing pull force.
- Cushioning: As the piston approaches the end of its stroke, the cushion mechanism engages, providing a controlled deceleration through throttled exhaust, reducing impact.
IV. Features
- Large Bore Design: 200 mm bore provides high output force, suitable for heavy-load applications.
- Standardized Structure: Conforms to ISO6431/VDMA standards, ensuring good interchangeability and ease of maintenance/replacement.
- Double-Acting: Provides reliable bi-directional movement (extension and retraction) driven by compressed air.
- Pneumatic Cushioning: Adjustable air cushions on both ends minimize end-impact, extending service life.
- Basic Mounting Type: Foot mounting with tapped holes facilitates fixed installation in various applications.
- Non-lubricated Design: Eliminates the need for an air line lubricator, suitable for clean environments and simpler circuits.
- High Reliability: Robust seal design ensures long service life, suitable for high-speed automation equipment.
V. Typical Application Scenarios
- Large Fixtures: Clamping and positioning mechanisms in welding/assembly fixtures for rapid workpiece handling.
- Material Handling: Pushing, lifting, and stopping actions for workpieces on conveyors in heavy-load applications.
- Testing Equipment: Long-stroke actuation for positioning mechanisms and test fixtures in multi-station testing cycles.
- Packaging Machinery: Clamping and positioning units in large sealing machines, labelers, adapting to compact layouts.
- Automated Production Lines: Clamping, pushing, lifting actions on automated lines for heavy-load, medium-stroke applications.
VI. Installation and Usage Precautions
- Mounting Location: Mount the cylinder on a sufficiently rigid base to avoid vibration and shock. Mounting surfaces should be machined for mounting screws to ensure secure installation. For applications involving impact from stoppers, etc., ensure thread engagement depth is at least 2 times the screw diameter.
- Alignment & Load: When connecting the piston rod to a load, ensure good alignment to avoid eccentric or side loads. Side loads on the piston rod are limited. Exceeding permissible values can cause abnormal seal wear, seizure between cylinder and piston, or abnormal bushing wear. Ensure loads remain within catalog specified limits.
- Speed Control: Install speed control valves (one-way flow control valves) at the cylinder’s inlet and/or outlet ports to achieve smooth speed adjustment. Recommended piston speed is 50–500 mm/s; avoid speeds outside this range to prevent reduced service life.
- Air Preparation: The air supply should be filtered (5 μm or finer) and dried to ensure clean, dry compressed air. Use clean air free from deteriorating compressor oil to prevent contamination.
- Maintenance & Inspection: Regularly inspect air lines for leaks and the piston rod for wear. If operation is abnormal, first check air pressure, piping, and flow control valve settings. Replace seals or the cylinder if necessary.
VII. Selection and Alternative Suggestions
- For different strokes, select other C95 models, e.g., C95SDB200-400 (400 mm stroke), C95SDB200-600 (600 mm stroke).
- For different bore sizes, consider C95SDB125-200 (125 mm bore), C95SDB160-200 (160 mm bore), C95SDB250-200 (250 mm bore).
- For models with a magnetic switch, consider variants like C95SDB200-200-D (with built-in magnet), facilitating position detection and electrical control.
Summary: The C95SDB200-200 is a compact and reliable standard type single-rod double-acting air cylinder. Its design, featuring “200 mm bore + 200 mm stroke + double-acting + pneumatic cushioning + basic mounting + high reliability,” provides high force and medium stroke actuation for industrial automation systems. It is an ideal choice for heavy-load applications such as large fixtures, material handling, and testing equipment.
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