The AirTAC Airtac SCD Standard Cylinder SCD200X125 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, 125mm stroke, PT3/4 ports and adjustable end cushioning.
The SCD200X125 is a large-bore double-rod pneumatic cylinder that produces exactly 15080 N of thrust in both directions at 0.5 MPa, thanks to its through-rod design where the 40 mm rod subtracts the same area from each piston face. With a 125 mm stroke and a body length A of 362 mm, it fits applications that need identical force and speed on the extend and retract strokes.
This tie-rod cylinder operates on filtered air from 0.15 to 1.0 MPa and uses PT 3/4 ports. The adjustable air cushion at each end (29 mm length) decelerates the piston smoothly, and the dual rod ends provide better bearing support than a single-rod cylinder, helping to manage the large forces involved.
| Model | Airtac SCD Standard Cylinder SCD200X125 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 125 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. |
| ×125 | 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 push-pull force of 15080 N at 0.5 MPa makes this cylinder ideal for heavy transfer shuttles that must move a load between two stations with identical power in each direction.
Use the SCD200X125 in a press where the tooling is mounted on both rod ends. The dual-rod design ensures the pressing force is perfectly balanced, preventing uneven wear on the bearings.
The exposed rear rod can carry a mechanical stopper or a sensor flag for DMSG/EMSG switches, giving you a robust, external end-of-stroke confirmation point without modifying the main tooling.
Choose the SCD200 when your application demands around 15080 N at 0.5 MPa in both directions. If you can accept slightly lower force, the SCD160 delivers 9425 N at the same pressure and has a smaller footprint. For tasks that only need force in one direction, a single-rod SC200 would be a more economical choice, as it provides a higher push force on the full-bore side. To replace an existing SCD200X125, match the 200 mm bore, 125 mm stroke, PT 3/4 ports, and any mounting accessory like the F-SC200TC centre trunnion or F-SC200LB foot mount.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 15080 N, at 0.7 MPa it's 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 absolutely equal force and speed in both directions, or when you need to mount tooling, a stopper, or a sensor target on the rear rod. The through-rod also provides better guidance and bearing load distribution than a single-rod cylinder, which is a significant advantage on a large 200 mm bore.
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