The AirTAC Airtac SCD Standard Cylinder SCD250X200S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø50mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø250mm bore, 200mm stroke, PT1" ports and adjustable end cushioning.
The SCD250X200S is a heavy-duty double-rod pneumatic cylinder engineered for applications demanding identical thrust in both directions. With a 250 mm bore and a 50 mm through-rod, it provides a substantial 23562 N of force for both extension and retraction at 0.5 MPa, rising to 42412 N at the maximum operating pressure of 0.9 MPa.
This model features a 200 mm stroke and a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod body for precise, non-contact position feedback. The adjustable air cushion at each end, with a 40 mm cushion length, decelerates the high-inertia piston smoothly, protecting the end caps during rapid cycling in large-scale industrial tasks.
| Model | Airtac SCD Standard Cylinder SCD250X200S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Rod diameter | Ø50 mm (both ends) |
| Stroke | 200 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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, 40 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 | 23562 N | 23562 N |
| 0.7 MPa | 32987 N | 32987 N |
| Max (@1.0 MPa) | 4805 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). |
|---|---|
| 250 | 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.
Provides equal, high-force clamping from both sides of a large workpiece, using the rear rod for a secondary tool or a mechanical stop, ensuring uniform pressure distribution in hydraulic-style pneumatic press replacements.
Pushes and pulls heavy pallets or steel plates across a roller conveyor with identical speed and force in both directions, with the rear rod driving a secondary transfer arm for synchronized multi-station movement.
Operates two independent mechanisms from a single cylinder body, such as opening a gate while simultaneously triggering a limit switch via the rear rod, simplifying circuit design for large-scale automation cells.
Select the SCD250 when your process needs a very high, symmetric force output that a smaller bore cannot supply; the SCD200 delivers 15080 N at 0.5 MPa, making it the next step down if this model exceeds your force requirement. A double-rod configuration is the correct choice when you need to attach tooling, a stop, or a sensor flag to the rear rod, or when the inherent anti-rotation guidance of the dual rod supports your application. For a direct replacement, match the 250 mm bore, 200 mm stroke, PT port thread, basic mounting, and the -S magnet option. If the 200 mm stroke creates a long unsupported rod section under side load, consider adding an external linear guide or upgrading to a guided cylinder to prevent rod bending and premature bearing wear.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is calculated by subtracting the 50 mm rod area from the 250 mm bore area. This gives a force of 23562 N at 0.5 MPa, 32987 N at 0.7 MPa, and 42412 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when your application requires equal force and speed in both directions, or when you need a second rod end to mount tooling, a cam, or a sensor flag. The through-rod also provides better guidance and resistance to rotation than a single-rod cylinder, though it is not a replacement for a fully guided unit under significant side loads.
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