The AirTAC Airtac SCD Standard Cylinder SCD200X800S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø40mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø200mm bore, 800mm stroke, PT3/4 ports and adjustable end cushioning.
The SCD200X800S delivers perfectly balanced bidirectional force, producing 15080 N in both push and pull directions at 0.5 MPa. This symmetry comes from the through-rod design, where the 40 mm rod extends from both ends, subtracting the same area from each piston face. At the maximum operating pressure of 0.9 MPa, the thrust reaches 27143 N, making it a powerful choice for heavy, two-sided tooling tasks.
With an 800 mm stroke and a body length A of 362 mm, this cylinder provides substantial linear travel while the dual rod supports better guidance than a single-rod equivalent. The built-in magnet, designated by the 'S' suffix, allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for precise, non-contact end-of-stroke or mid-stroke position sensing. It operates on 40 µm filtered air within a -20 to +70 °C range, using PT3/4 ports and an adjustable air cushion of 29 mm to decelerate the large mass smoothly.
| Model | Airtac SCD Standard Cylinder SCD200X800S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 800 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max stroke | Up to 1500 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | 21111 N |
| Max (@1.0 MPa) | 3075 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.
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 200 | 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.
The equal force and speed in both directions make this cylinder ideal for heavy shuttle tables that move a load, stop, and return with the same dynamic performance, simplifying pneumatic circuit design.
Mount a die on each rod end to stamp two parts per cycle. The 27143 N thrust at 0.9 MPa provides ample force for forming operations, while the through-rod ensures perfectly synchronized actuation.
The 'S' magnet option enables a sensor to be placed on the rear rod's path, confirming full retraction without needing access to the front end. This is critical for safety interlocks in automated welding cells.
For applications needing more force, the SCD250X800 steps up to a 50 mm rod, providing 23562 N at 0.5 MPa. If 15080 N is sufficient but a shorter or longer stroke is required, the SCD200 series is available in standard strokes from 25 mm up to 1500 mm. A single-rod SC cylinder would be a better choice only if the rear rod extension is unused and the unequal push/pull force is acceptable.
This 800 mm stroke model has a long, unsupported rod section. Under significant side loads, the rod can deflect, causing seal wear and premature failure. For such cases, an external linear guide or a dedicated guided cylinder is essential. To replace an existing unit, match the 200 mm bore, 800 mm stroke, PT3/4 port thread, basic mounting, and the integrated magnet feature.
Double-rod checklist
The push and pull forces are identical because the rod extends from both ends. At 0.5 MPa, the force is 15080 N. At 0.7 MPa, it is 21111 N, and at the maximum operating pressure of 0.9 MPa, it reaches 27143 N. The theoretical force at 1.0 MPa is 3075 kgf.
Choose the SCD200 when you need perfectly equal force and speed in both directions, or when you need to mount tooling, a stopper, or a sensor flag on the rear rod. The dual-rod design also provides better inherent guidance and bearing support than a single-rod cylinder, reducing rod deflection under axial loads.
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