The AirTAC Airtac SCD Standard Cylinder SCD125X800 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, 800mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X800 is a double-acting, double-rod pneumatic cylinder with a 125 mm bore and 800 mm stroke, engineered for applications demanding identical force and speed in both directions. With a 32 mm rod extending from both ends, it provides 5734 N of thrust each way at 0.5 MPa, rising to 10321 N at 0.9 MPa, making it a powerful choice for balanced, heavy-duty linear tasks.
This ISO 6430 class tie-rod cylinder features a 28 mm adjustable air cushion on each end cap to decelerate high-inertia loads smoothly. The through-rod design improves guidance and resists rotation better than a single-rod cylinder, while the rear rod extension is ideal for mounting a secondary tool, stopper, or external position sensor flag.
| Model | Airtac SCD Standard Cylinder SCD125X800 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 800 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. |
| ×800 | 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.
Operates pressing, clamping, or forming tools mounted on both rod ends simultaneously, delivering an equal 5734 N at 0.5 MPa to each side for perfectly synchronized dual-action processes.
Powers a transfer shuttle with the rear rod available for a counterbalance or a secondary sensor flag. The 800 mm stroke moves large pallets or components between stations with consistent force.
The dual-rod linkage provides inherent anti-rotation for a pusher plate, ejecting heavy parts or scrap without a separate external guide, using the full 10321 N thrust at 0.9 MPa.
Step up to this 125 mm bore when the SCD100's 3681 N force at 0.5 MPa is insufficient for your dual-sided application. If you need a lower force output, the SCD100 delivers 3681 N. For applications with significant off-axis loading, remember that while the double rod offers better support than a single rod, a dedicated guided cylinder or external linear guide is required to manage true side loads. This model replaces any AirTAC SCD125X800 with matching PT ports and basic mounting; for a drop-in swap, also match the magnet option and seal material. At an 800 mm stroke, ensure the unsupported rod section is protected from bending moments by aligning the load precisely or adding an external guide rail.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 5734 N, at 0.7 MPa it outputs 8028 N, and at the maximum operating pressure of 0.9 MPa it delivers 10321 N in both directions.
Choose the SCD when you need equal force and speed in both directions, or when you require a rear rod extension to mount tooling, a limit switch flag, or a mechanical stop. The through-rod also provides better support and natural anti-rotation compared to a standard single-rod cylinder.
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