The AirTAC Airtac SCD Standard Cylinder SCD32X120 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø12mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø32mm bore, 120mm stroke, PT1/8 ports and adjustable end cushioning.
The SCD32X120 is a double-acting, double-rod pneumatic cylinder that outputs an identical 345 N of force in both push and pull directions at 0.5 MPa, thanks to its through-rod design where the 12 mm rod extends from both ends. This symmetry is ideal for applications like two-sided tooling or transfer mechanisms where balanced motion is critical.
With a 120 mm stroke and a compact body length of 187 mm (A dimension), it fits neatly into space-constrained automation cells. The adjustable air cushion, with a 21 mm cushion length, decelerates the piston smoothly at each end, reducing impact noise and wear during high-cycle operation.
| Model | Airtac SCD Standard Cylinder SCD32X120 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 120 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1000 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 | 346 N | 346 N |
| 0.7 MPa | 484 N | 484 N |
| Max (@1.0 MPa) | 70 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). |
|---|---|
| 32 | Bore size in mm. |
| ×120 | 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 345 N at 0.5 MPa makes this cylinder perfect for shuttle tables where a workpiece must be moved with the same power in both directions.
Mount a tool on each rod end for a two-station stamping or marking process, using the rear rod for a secondary operation like ejecting a finished part.
The twin-rod design provides inherent anti-rotation, allowing it to act as a simple guided pusher for light-duty pressing or aligning components without a separate guide rail.
For a step up in force, the SCD40 series provides 528 N at 0.5 MPa, while a step down to a smaller bore is not available in the SCD range. If your application only requires actuation from one side, a single-rod SC32 cylinder might be a more economical choice, though it will not provide the equal bidirectional force or rear-rod access of this model.
For direct replacement, match the 32 mm bore, 120 mm stroke, PT1/8 port thread, and basic mounting configuration. Adding a magnet option (-S suffix) enables position sensing with CMSG/DMSG sensors. Note that for strokes over 300 mm, an external guide is recommended to protect the 12 mm rod from bending under side loads.
Double-rod checklist
The push and pull force is identical at 345 N (0.5 MPa), 483 N (0.7 MPa), and 621 N (0.9 MPa). This is because the 12 mm piston rod passes through both ends, subtracting the same area from each side of the piston.
Choose the SCD when you need equal force and speed in both directions, or when you need to attach tooling, a cam, or a sensor flag to the rear rod. The through-rod also provides better support for the piston, reducing uneven seal wear.
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