The AirTAC Airtac SCD Standard Cylinder SCD80X125 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, 125mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X125 is a double-acting, double-rod pneumatic cylinder that delivers identical force in both directions—2268 N of thrust whether extending or retracting at 0.5 MPa. With a 25 mm rod passing through both end caps, it provides symmetrical loading and a rear rod end that can carry a sensor flag, stopper, or secondary tooling, making it a natural fit for transfer mechanisms and two-sided actuation tasks.
This 80 mm bore model uses a PT3/8 port and an M20x1.5 rod thread, with an adjustable air cushion of 28 mm at each end to decelerate the piston smoothly. The body length A(SCD) is 257 mm, and because the rod protrudes from both ends, the overall retracted length is longer than a comparable single-rod SC cylinder—plan your envelope accordingly.
| Model | Airtac SCD Standard Cylinder SCD80X125 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 125 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. |
| ×125 | 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 lets you mount a workpiece carrier on the front rod and a counterbalance or secondary tool on the rear rod, giving equal speed and force in both directions for smooth, repeatable shuttling.
Identical push and pull force at every pressure makes this cylinder ideal for clamping fixtures where the return stroke must apply the same controlled force as the advance stroke, simplifying pneumatic circuit design.
With the rod extending from the rear cap, you can attach a sensor flag or cam directly to the back end without interfering with the main tooling, keeping the front work area clear while enabling end-of-stroke detection.
Choose the SCD80X125 when you need balanced push-pull output in the 2268 N range at 0.5 MPa. If your load demands more force, stepping up to the 100 mm bore SCD100 series provides 3681 N at the same pressure; if you can accept less, the 63 mm bore SCD63 delivers 1402 N. For applications where only one rod end is needed, the single-rod SC80 series offers a higher push force on the full-bore side and may reduce the overall machine footprint.
When replacing an existing cylinder, match all five points: 80 mm bore, 125 mm stroke, PT3/8 port thread, the specific SCD mounting accessory (this basic model has none), and the magnet option (this unit is non-magnetic). For strokes of 300 mm or longer, always assess the unsupported rod length for buckling risk; at 125 mm this is rarely a concern, but any side load still calls for an external guide or a dedicated guided cylinder rather than relying on the through-rod alone.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 2268 N, at 0.7 MPa it delivers 3175 N, and at the maximum operating pressure of 0.9 MPa it reaches 4082 N in both directions.
Pick the SCD when you need identical force and speed in both directions, want to mount tooling or sensors on both ends of the rod, or require the improved bearing support and anti-rotation guidance that a through-rod provides. If you only need force from one end and want a shorter overall length, the single-rod SC series is usually the better choice.
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