The AirTAC Airtac SCD Standard Cylinder SCD125X50 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, 50mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X50 is a double-acting, double-rod pneumatic cylinder that generates an identical 5734 N of thrust in both directions at 0.5 MPa, thanks to its 32 mm rod passing through both end caps. This equal-force characteristic makes it ideal for tasks requiring balanced, two-sided actuation or where a rear rod extension is needed to mount a limit switch or secondary tooling.
With a 50 mm stroke and a 28 mm adjustable air cushion, this ISO 6430 class tie-rod cylinder decelerates the piston smoothly at each end. The body length A(SCD) is 291 mm, providing a compact yet robust footprint for symmetrical push-pull operations in heavy-duty industrial settings.
| Model | Airtac SCD Standard Cylinder SCD125X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 50 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. |
| ×50 | 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 through-rod provides a mounting point on both ends, allowing a single cylinder to drive a transfer shuttle back and forth with equal speed and force in each direction.
Delivers 10321 N of clamping force at 0.9 MPa from either end, ideal for fixtures where the tooling must be mounted on the rear rod to balance the load across the cylinder's bearings.
The protruding rear rod is a perfect location for a sensor flag or a manual stroke-adjustment stopper, keeping the front work area clear while enabling precise end-of-stroke detection.
Choose the SCD125X50 when your application demands perfectly symmetrical force output, as the double-rod design eliminates the thrust differential found in single-rod cylinders. If 5734 N at 0.5 MPa is more force than needed, consider stepping down to the SCD100 bore, which provides 3681 N. For applications that do not require a rear rod, the single-rod SC125 series offers a simpler, more cost-effective solution. This model is a direct dimensional replacement only for another AirTAC SCD125 cylinder matching the 50 mm stroke, PT ports, and basic mounting configuration.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 5734 N, at 0.7 MPa it produces 8028 N, and at the maximum operating pressure of 0.9 MPa it delivers 10321 N in both directions.
Select the SCD when you need identical force and speed in both directions, or when you require a rear rod extension to mount tooling, a stopper, or a sensor flag. The through-rod also provides better guidance and resistance to side load than a single-rod cylinder, though it is not a substitute for a fully guided unit under high lateral forces.
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