The AirTAC Airtac SCD Standard Cylinder SCD250X700S 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, 700mm stroke, PT1" ports and adjustable end cushioning.
The AirTAC SCD250X700S is a large-bore double-rod pneumatic cylinder engineered for heavy-duty applications where identical force and speed are required in both directions. With a 250 mm bore and a 50 mm rod extending from both end caps, it produces an equal 23562 N of push and pull force at 0.5 MPa, rising to 42412 N at the maximum operating pressure of 0.9 MPa. This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors for precise end-of-stroke detection without external brackets.
Built on a durable tie-rod construction, the SCD250X700S features a 700 mm stroke and an adjustable air cushion (40 mm length) at each end to decelerate large inertial loads smoothly. The through-rod design provides superior guidance and anti-rotation compared to a single-rod cylinder, making it ideal for tooling mounted on both sides. Its PT1 inch ports supply ample flow for the 30-500 mm/s speed range typical of this ISO 6430 class cylinder, ensuring reliable cycling in demanding industrial environments.
| Model | Airtac SCD Standard Cylinder SCD250X700S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Rod diameter | Ø50 mm (both ends) |
| Stroke | 700 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. |
| ×700 | 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 700 mm stroke and equal force in both directions make this cylinder ideal for shuttling heavy pallets or fixtures between two stations, with tooling mounted on both rod ends for balanced operation.
Delivering over 23 kN of force each way at 0.5 MPa, it can power a two-sided press or clamping fixture where the workpiece is engaged from both sides simultaneously with identical pressure.
The built-in magnet enables clean sensor installation on the barrel to detect piston position, while the rear rod extension provides a convenient mounting point for a secondary sensor flag or mechanical stop.
Select the SCD250X700S when your application demands balanced, high-force actuation from both ends of the piston rod. If your force requirement is lower, stepping down to the 200 mm bore SCD series reduces the output to 15080 N at 0.5 MPa, which may offer a more compact and economical solution. For applications needing only a single working end, the standard SC single-rod cylinder provides a higher push force from the full piston area and is generally the better choice.
At a 700 mm stroke, the long unsupported rod section on this double-rod cylinder requires careful management of side loads. If the tooling applies any lateral force, integrate an external linear guide or switch to a factory-guided cylinder to prevent rod bending and premature seal wear. This model is a direct dimensional replacement only for another AirTAC SCD250 double-rod cylinder sharing the same 700 mm stroke, PT port thread, basic mounting, and the -S magnet option.
Double-rod checklist
Because the piston rod extends through both ends of the cylinder, the effective pressure area is identical for both directions. The force is 23562 N at 0.5 MPa, 32987 N at 0.7 MPa, and 42412 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 4805 kgf.
Choose the SCD when you need perfectly equal force and speed in both directions, or when you need to mount tooling, stops, or sensors on both ends of the rod. The through-rod also provides better support for the piston, reducing uneven bushing wear, though it is not a substitute for an external guide if high side loads are present.
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