The AirTAC Airtac SCD Standard Cylinder SCD125X200S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 200mm stroke, PT1/2 ports and adjustable end cushioning.
This SCD125X200S double-rod cylinder provides perfectly balanced bidirectional force, outputting 5734 N in both push and pull at 0.5 MPa. The 32 mm diameter rod passes through both end caps, giving you a rear rod extension that is ideal for mounting a secondary tool, a mechanical stop, or an external position-sensing flag without adding offset load.
With a 200 mm stroke and a body length A of 291 mm, this tie-rod cylinder includes an integrated magnet (the -S suffix) so you can directly clamp CMSG, DMSG, or EMSG sensors onto the barrel for reliable, non-contact end-of-stroke detection. Its adjustable air cushion, with a 28 mm cushion length, decelerates the piston smoothly at both ends of travel.
| Model | Airtac SCD Standard Cylinder SCD125X200S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 200 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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, 28 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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). |
|---|---|
| 125 | 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.
The equal 5734 N push/pull force at 0.5 MPa makes this cylinder perfect for shuttle tables that transfer heavy pallets or fixtures between two parallel conveyor lines, ensuring consistent speed and power in each direction.
Use the protruding rear rod with a flag and the barrel's built-in magnet to mount CMSG sensors, creating a clean, non-contact end-of-stroke confirmation system for both ends of the 200 mm travel.
Ideal for a dual-sided clamping station where a tool on each rod end simultaneously clamps two parts against a central fixture, leveraging the 2523 N of thrust available at 0.9 MPa for a secure hold.
Choose the SCD125 when your application needs the symmetric 5734 N force at 0.5 MPa that this 125 mm bore delivers. If you require a more compact unit with lower thrust, the SCD100 bore provides 3681 N at the same pressure, while stepping up to the SCD160 bore nearly doubles the output to 9425 N. This double-rod design is the right choice over a single-rod SC cylinder when you need to attach tooling or sense position from the rear, or when the equal force and speed in both directions simplifies your pneumatic circuit design.
For this 200 mm stroke, the through-rod provides better bearing support than a single-rod cylinder, but it is not a guided cylinder. If your application imposes significant side loads, you must pair it with an external guide rail. To replace an existing SCD125X200S, match the 125 mm bore, 200 mm stroke, PT port thread, basic mounting, and the integrated magnet feature.
Double-rod checklist
Because the piston rod occupies both sides of the piston, the effective pressure area is identical for push and pull. The forces are: 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and 10321 N at the maximum operating pressure of 0.9 MPa.
You would select this SCD model when you need identical force and speed in both directions, or when the rear rod extension is required to mount a tool, a stop, or a sensor flag. The through-rod design also provides better guidance and reduces bushing wear compared to a single-rod cylinder under light, non-side-loaded conditions.
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