The AirTAC Airtac SCD Standard Cylinder SCD80X500 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, 500mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X500 is an 80 mm bore double-rod pneumatic cylinder providing a balanced 500 mm stroke, where the piston rod extends from both ends to deliver identical force in each direction. At a standard 0.5 MPa air supply, it generates 2268 N of thrust both pushing and pulling, rising to 4082 N at the maximum operating pressure of 0.9 MPa, thanks to the equal effective piston area on either side of the 25 mm diameter rod.
This tie-rod cylinder features an adjustable air cushion at each end with a 28 mm cushion length to decelerate high-inertia loads smoothly. The body length A(SCD) is 257 mm, and with the rod protruding from both caps, the overall retracted length is longer than a single-rod SC of the same dimensions, making it ideal for applications requiring a rear rod for tooling, a stopper bolt, or an external sensor flag.
| Model | Airtac SCD Standard Cylinder SCD80X500 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 500 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. |
| ×500 | 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 design allows a tooling plate to be mounted on both ends, enabling a single cylinder to shuttle parts between two parallel conveyor lines with perfectly synchronized motion and equal force in both directions.
Ideal for edge-folding or clamping fixtures where two opposing platens must close simultaneously. The equal push and pull force of 2268 N at 0.5 MPa ensures uniform pressure is applied from both sides without complex linkages.
The dual-rod configuration provides inherent anti-rotation stability for a front pusher block, while the rear rod extension serves as a perfect mounting point for a stroke-sensing flag or an adjustable hard stop to set a precise retract position.
Select the SCD80X500 when your mechanism needs a symmetric 2268 N force output at 0.5 MPa in a 500 mm stroke. If your force requirement is lower, the 63 mm bore SCD63 series provides 1402 N; for significantly higher force, step up to the 100 mm bore SCD100 which delivers 3681 N at the same pressure. Should your application only need actuation from one side, the single-rod SC80 series is a more compact and cost-effective alternative.
For this 500 mm stroke, be mindful of the long, unsupported rod length when fully extended. While the double-rod design offers better guidance than a single rod, it is not a substitute for a proper guided cylinder under substantial side loads. To prevent rod buckling or bending, use an external linear guide or switch to a guided actuator. As a direct replacement, match this model's 80 mm bore, 500 mm stroke, PT port thread, basic mounting, and absence of a magnet.
Double-rod checklist
Yes, they are identical. Because the 25 mm piston rod passes through both end caps, the effective pressure area is the same on both sides of the piston. At 0.5 MPa, the force is 2268 N in both directions, and at 0.7 MPa, it is 3175 N.
Choose the SCD80X500 when you need to mount tooling, sensors, or a mechanical stop on the rear rod, or when your application benefits from the improved rod guidance and equal bidirectional force that a through-rod design provides. If you only need to push from one end and space is a constraint, the single-rod SC80 is the better choice.
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