Detailed Explanation of CRB2BWU40-180SZ Rotary Cylinder Product
2025-07-101. Product Overview
CRB2BWU40-180SZ is a compact vane-type rotary cylinder produced by SMC. It is driven by compressed air to realize 90° or 180° angle rotation (the specific angle is determined by the model). This product adopts a lightweight design, suitable for automation scenarios with limited space but requiring precise angle control.
2. Core Features
✅ Double-vane structure: Stable torque output, 180° rotation (the suffix SZ may indicate the rotation angle)
✅ Compact and lightweight: Only 40mm in width (a feature of the BW series), saving installation space
✅ High-precision positioning: Optional built-in magnetic ring (cooperating with sensors to achieve position feedback)
✅ Multiple installation methods: Flange type / foot seat type installation (U indicates the installation method)
✅ Adjustable buffer: Adjustable air buffers at both ends to reduce impact when in place
3. Model Interpretation
| Code Segment | Meaning |
|---|---|
| CRB2 | SMC rotary cylinder series |
| BW | Compact double-vane structure |
| U40 | Cylinder width 40mm |
| 180 | Swing angle 180° |
| SZ | Special configuration (may include sensor / buffer type) |
4. Technical Parameters
| Item | Parameter |
|---|---|
| Rotation angle | 180° (90° can be customized) |
| Torque output | Approximately 1.5N·m@0.5MPa (to be verified) |
| Working pressure | 0.1~0.7MPa |
| Repeat accuracy | ±0.5° |
| Interface size | M5 or 1/8″ |
| Weight | Approximately 0.8kg (aluminum main body) |
| Protection level | IP40 (standard) |
5. Typical Applications
- 90°/180° flipping mechanism: Workpiece flipping, fixture steering
- Indexing positioning: Automatic indexing plate, detection station conversion
- Valve control: Pneumatic drive of butterfly valve / ball valve
- Assembly equipment: Angle adjustment of precision components
6. Selection Guide
Angle selection:
- Standard angles: 90°, 180°
- Special angles can be customized (45°~270°)
Torque matching:
Theoretical torque = Pressure (MPa) × Effective area of vane (cm²) × Force arm (cm)
It is recommended that the load torque ≤ 70% of the rated torque
Recommended accessories:
- Magnetic switch (D-M9 series)
- Speed control valve (to control the rotation speed)
- Flange mounting bracket
7. Installation Precautions
Load connection:
- Use a flexible coupling to reduce eccentric load
- Avoid radial force >50N
Air circuit configuration:
- Recommended pressure: 0.3~0.5MPa
- Install a muffler at the exhaust port
Speed adjustment:
- Control the intake / exhaust flow through the speed control valve
- Recommended speed: 0.5~1 second / 90°
8. Maintenance Points
Regular inspection:
- Check whether the shaft seal leaks air every month
- Lubricate the sliding parts every quarter (use SMC special grease)
Troubleshooting:
| Phenomenon | Possible Cause | Solution |
|---|---|---|
| Failure to rotate in place | Excessive load / Insufficient air pressure | Check torque matching / Increase pressure |
| Air leakage | Wear of shaft seal | Replace the seal |
| Action jitter | Poor buffering | Adjust the buffer screw |
9. Comparison with Similar Products
| Model | Angle | Torque | Features |
|---|---|---|---|
| CRB2BWU40-90 | 90° | 2.0N·m | Short angle, high torque |
| CRB2BWU50-180 | 180° | 3.5N·m | Large size, enhanced type |
| CRBU15-90 | 90° | 0.8N·m | Ultra-thin design |
10. Summary
CRB2BWU40-180SZ, with its 180° rotation capability and compact design, is especially suitable for:
- Automation equipment with limited space
- Angle control requiring medium torque
- High-frequency swing occasions (service life up to 5 million times)
Key points for selection:
- Confirm the load torque requirement
- Match the rotation angle
- Consider the installation space limitation
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