The AirTAC Airtac SCD Standard Cylinder SCD80X250 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, 250mm stroke, PT3/8 ports and adjustable end cushioning.
The AirTAC SCD80X250 is a double-acting, double-rod pneumatic cylinder that provides perfectly symmetrical force and speed in both directions, delivering 2268 N of thrust each way at 0.5 MPa. With a 25 mm diameter rod extending from both ends, it is ideal for applications requiring a rear rod connection for tooling, limit switches, or manual override mechanisms, offering better bearing support than a single-rod design.
This 250 mm stroke model operates within a 30-800 mm/s speed range and features an adjustable air cushion (28 mm length) at both ends to decelerate the piston smoothly. The tie-rod construction uses a PT3/8 port and an M20x1.5 rod thread, with a body length A(SCD) of 257 mm, making it a robust choice for two-sided actuation tasks where balanced motion is critical.
| Model | Airtac SCD Standard Cylinder SCD80X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 250 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. |
| ×250 | 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 2268 N at 0.5 MPa makes the SCD80X250 perfect for shuttle tables that move a load between two fixed positions, using the rear rod for synchronized end-stops or sensor flags.
Mount a pressing tool on the front rod and a stripper plate or ejector on the rear rod. Both ends move in perfect sync, simplifying complex two-step assembly or forming fixtures.
The through-rod design provides superior anti-rotation stability compared to a single rod, making it a reliable choice for pushing components onto a conveyor without the rod twisting under load.
Select the SCD80X250 when your application requires a balanced 2268 N output at 0.5 MPa in both extend and retract. If your force requirement is lower, stepping down to the SCD63 bore provides 1402 N, while a step up to the SCD100 bore offers 3681 N under the same pressure. If you only need to apply force from one end, a standard single-rod SC80 cylinder may be a more compact and cost-effective alternative.
For a direct replacement, match the 80 mm bore, 250 mm stroke, PT3/8 port thread, and the specific SCD mounting accessory (if any). At this 250 mm stroke, the dual-rod design provides good inherent guidance, but if the load applies significant side force, an external guide rail or a dedicated guided cylinder is required to prevent rod bending and premature seal wear.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it is 3175 N, and at the maximum operating pressure of 0.9 MPa, the force is 4082 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 for mounting external devices like cams, sensors, or a manual adjustment knob. The dual-rod also provides better guidance and resistance to rod rotation than a single-rod SC cylinder.
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