CXSM15-40: The “Space-Saving Dual-Rod Dual-Action” Compact Cylinder
2026-02-10
The SMC CXSM15-40 is a compact double-rod cylinder specifically designed for space-constrained applications. Featuring a unique dual piston rod structure and an extremely short axial length, it delivers highly rigid, anti-bending linear motion. It is the ideal actuator for precision gripping or positioning in sophisticated automated equipment.
Key Parameters at a Glance
| Parameter Item | Specification | Description |
|---|---|---|
| Product Series | CXSM (Double-Rod Cylinder) | Compact structure with strong anti-bending capability |
| Bore Size | 15 mm | Piston diameter, determining the output force |
| Stroke | 40 mm | Maximum extension/retraction distance of the piston rod |
| Action Type | Double-acting | Bi-directional pneumatic drive, no spring return |
| Maximum Operating Pressure | 0.7 MPa | Maximum allowable working air pressure |
| Port Size | M5×0.8 | Thread specification for connecting air tubing |
| Cushion Type | Rubber Cushion | Cushioning method at stroke ends to absorb impact |
| Bearing Type | Slide Bearing | Piston rod guidance method, offering relatively high precision |
In-Depth Product Analysis
1. Model Code Breakdown
- CXSM: Series designation.
- CX: Typically represents “Compact” or a specific series.
- SM: Typically represents “Slide Bearing”, distinguishing it from “Ball Bearing”.
- 15: Bore size code, indicating a piston diameter of 15 mm.
- 40: Stroke code, indicating a piston rod travel length of 40 mm.
2. Core Features & Advantages
- Dual-Rod Structure for Anti-Bending: Its most prominent feature is the two parallel piston rods. This structure significantly enhances the cylinder’s resistance to bending, allowing it to withstand higher radial loads or moments. This makes it exceptionally well-suited for clamping applications or those with eccentric loads.
- Compact Design Saves Space: Compared to standard cylinders, the CXSM series typically features a shorter axial length, making it perfect for installation inside equipment with limited internal space.
- High-Precision Guidance: Slide bearings provide good guiding accuracy, minimizing piston rod wobble and achieving relatively high repeatability.
- Lubrication-Free Operation: Often designed for non-lubricated (oil-free) operation. It can be used directly with clean, dry air without requiring additional lubrication, making it suitable for cleanroom environments or the food and pharmaceutical industries.
3. Typical Application Scenarios
- Precision Clamping: Used for precise workpiece clamping in automated production lines, leveraging the dual rods’ anti-bending characteristics to ensure stable gripping.
- Compact Assembly Equipment: Pushing or positioning components in space-constrained devices for electronic component assembly, PCB handling, etc.
- Inspection Equipment: Operating lifting or positioning mechanisms for sample stages in optical inspection systems.
Selection & Usage Recommendations
- Force Calculation: Although the bore size is small (15mm), due to the dual-rod structure, the actual force calculation must account for the area occupied by the piston rods (retracting force is less than extending force).
- Installation Space Allowance: Despite its compact design, sufficient space must be reserved for the extended piston rod (40mm stroke) to avoid collision with the equipment housing.
- Load Matching: Ensure the cylinder’s output force is adequate to overcome the load resistance. If the load is heavy or speed is high, verify that the cushioning effect is sufficient.
- Air Supply Conditioning: Even with its non-lubricated design, using a clean, dry air source is recommended. Installing a filter at the air inlet is advisable to prevent seal damage from dust.
Summary
The SMC CXSM15-40 is a classic compact double-rod cylinder. Its core value lies in its exceptional anti-bending capability and space-saving installation. For automated equipment that requires high-rigidity linear motion within a confined space, this cylinder is a cost-effective choice with excellent performance.
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