Airtac SCD Standard Cylinder SCD50X800
The AirTAC Airtac SCD Standard Cylinder SCD50X800 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, 800mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke800 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X800
The SCD50X800 is a double-acting pneumatic cylinder with a piston rod extending from both ends, producing identical 825 N of force in each direction at 0.5 MPa. Its 20 mm diameter through rod and 800 mm stroke make it a practical choice for transfer mechanisms that need to mount tooling or sensors on both sides of the cylinder.
With a body length of 207 mm and a 21 mm adjustable air cushion at each end, this tie-rod cylinder decelerates loads smoothly without requiring external shock absorbers. The equal push-pull output and symmetric rod guidance help maintain alignment in applications where a single rod would create an unbalanced bearing load.
Airtac SCD Standard Cylinder SCD50X800 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X800 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 800 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 SCD50X800
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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 SCD50X800 Is Used
Two-Sided Transfer Shuttle
The through rod allows a single cylinder to power a shuttle table, with the rear rod end available to mount a counterbalance or a secondary tooling plate for balanced, high-cycle part transfer.
Synchronized Pressing
Delivers equal 1484 N of force at 0.9 MPa from both ends, ideal for a dual-sided clamping or pressing fixture where the workpiece is accessed from opposite sides simultaneously.
Non-Rotating Linear Guide
The dual-rod support provides better resistance to rotation than a single-rod cylinder, making it suitable for a simple, non-rotating pusher or lifter where adding external guides is not possible.
Is the Airtac SCD Standard Cylinder SCD50X800 the Right Cylinder?
Choose the SCD50X800 when your application demands equal force and speed in both directions over a long 800 mm stroke. If 825 N at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1402 N, while downsizing to the 40 mm bore offers 528 N. For a direct replacement, match the 50 mm bore, 800 mm stroke, PT port thread, basic mounting, and the absence of a magnet.
At this stroke length, the unsupported rod can be susceptible to bending under side loads. If the load is not guided externally, consider adding an external linear guide or switching to a dedicated guided cylinder to prevent premature rod bearing wear and ensure reliable operation.
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 SCD50X800 FAQ
Because the rod passes through both end caps, the effective piston area is identical in both directions. 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.
You would select the SCD50X800 when you need identical force and speed for both the extend and retract strokes, or when you require a rear rod extension to mount a sensor flag, a mechanical stop, or a second set of tooling. The through rod also provides more stable guidance than a single-rod cylinder.
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