The AirTAC Airtac SCD Standard Cylinder SCD80X270S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø80mm bore, 270mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X270S delivers perfectly balanced bidirectional force, outputting 2268 N of thrust in both extend and retract at 0.5 MPa thanks to its through-rod design. With a 25 mm rod protruding from both ends, this cylinder eliminates force asymmetry, making it ideal for applications where the tooling or load must be driven with identical power in each direction.
Equipped with a built-in magnet, this model accepts CMSG, DMSG, and EMSG sensors directly on the tie-rod barrel for precise, non-contact position sensing. The 28 mm adjustable air cushion at each end decelerates the piston smoothly, protecting the end caps during high-cycle operation within its 30-800 mm/s speed range.
| Model | Airtac SCD Standard Cylinder SCD80X270S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 270 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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.
Moves parts between two stations with equal speed and force in both directions, simplifying pneumatic circuit design.
The rear rod provides a convenient flag surface for end-of-stroke sensors without adding brackets to the moving load.
Applies identical clamping pressure from two opposing sides using a single cylinder, ensuring even part deformation.
For applications needing more force, step up to the SCD100 bore which provides 3681 N at 0.5 MPa. If the load is only on one end of the rod, a single-rod SC80 cylinder may be a simpler choice, but it will have unequal push/pull forces. At a 270 mm stroke, the dual-rod support helps manage bending moments better than a single rod, but sustained side loads still demand an external guide or a dedicated guided cylinder. This SCD80X270S is a direct dimensional replacement only for another AirTAC SCD80 of the same stroke, port type, and magnet option.
Double-rod checklist
The forces are identical in both directions. At 0.5 MPa it outputs 2268 N, at 0.7 MPa it is 3175 N, and at the maximum operating pressure of 0.9 MPa it reaches 4082 N.
Choose the SCD when you need perfectly equal speed and force for both extend and retract strokes, or when you need a second rod end to mount tooling, a cam, or a sensor flag. The through-rod also provides better support against side loads than a single-rod cylinder of the same bore.
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