Airtac SCD Standard Cylinder SCD50X200
The AirTAC Airtac SCD Standard Cylinder SCD50X200 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 200mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke200 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X200
The SCD50X200 is a double-acting pneumatic cylinder with a through-rod design, meaning the 20 mm piston rod extends from both ends. This configuration guarantees identical force output in both directions because the rod area is subtracted from both piston faces, yielding a balanced 825 N of thrust each way at 0.5 MPa.
Built on a rugged tie-rod body with a length of 207 mm, this 50 mm bore actuator is engineered for tasks where symmetric motion and force are non-negotiable. The adjustable air cushion at each end (21 mm length) decelerates the piston smoothly, protecting end caps during high-cycle operation at speeds up to 800 mm/s.
Airtac SCD Standard Cylinder SCD50X200 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X200 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 200 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCD Standard Cylinder SCD50X200
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCD Standard Cylinder SCD50X200 Is Used
Bidirectional Clamping
The equal 825 N force in both directions makes this cylinder ideal for two-sided clamping fixtures where the workpiece must be held with identical pressure from opposing sides.
Transfer Shuttle
Use the rear rod to mount a counterbalance or secondary tooling plate on a linear transfer shuttle, keeping the moving mass symmetric and reducing bushing wear.
Non-Rotating Pusher
The dual-rod design provides inherent anti-rotation stability, allowing the SCD50X200 to push components along a track without a separate external guide for light alignment tasks.
Is the Airtac SCD Standard Cylinder SCD50X200 the Right Cylinder?
This 200 mm stroke model fits standard automation envelopes, but before specifying, verify the force requirement. If 825 N at 0.5 MPa is insufficient, stepping up to the 63 mm bore (SCD63) provides 1402 N at the same pressure. If the application only needs a single working end, the single-rod SC50 series is a lighter, more compact alternative.
For replacement, match the 50 mm bore, 200 mm stroke, PT1/4 port thread, and basic mounting. The SCD double-rod cylinder is not dimensionally interchangeable with ISO 15552 profiles. At this stroke length, ensure the dual rod is not subjected to high side loads without an external guide, as the internal bushings are designed for axial thrust, not bending moments.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD50X200 FAQ
Because the rod passes through both ends, the effective piston area is identical for push and pull. The force is 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD50 when you need identical speed and force in both directions, or when you require a rear rod extension to mount sensors, cams, or a secondary tool. It also offers better guidance than a single-rod cylinder, though it is not a replacement for a fully guided actuator under heavy side loads.
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