The AirTAC Airtac SCD Standard Cylinder SCD63X180 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 180mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X180 is a double-acting, double-rod pneumatic cylinder that outputs identical force in both directions because the 20 mm rod passes through both end caps. At 0.5 MPa this model produces 1402 N of thrust each way, making it a balanced actuator for tasks where the return stroke must match the power of the extend stroke.
With a 180 mm stroke and a body length A of 210 mm, this 63 mm bore cylinder fits compact dual-tooling setups. The adjustable air cushion at each end is 28 mm long, providing smooth deceleration without any mechanical locking function—external holding is required if the load must stay put when air is exhausted.
| Model | Airtac SCD Standard Cylinder SCD63X180 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 180 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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). |
|---|---|
| 63 | Bore size in mm. |
| ×180 | 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 rod extending from both ends allows a single cylinder to push a pallet into a station and simultaneously retract a stop pin on the opposite side, synchronizing two actions with one actuator.
With a 20 mm rod supported by bearings in both end caps, the SCD63X180 resists twisting better than a single-rod design, keeping a mounted pusher plate aligned without a separate guide rail for light-duty sorting.
The rear rod end provides a clean mounting point for a sensor flag or cam, letting you detect piston position from the back of the machine when the front rod is enclosed in tooling.
Choose the SCD63X180 when you need symmetric force around 1400 N at 0.5 MPa. If your load requires more thrust, stepping up to the 80 mm bore provides 2268 N at the same pressure, while the 50 mm bore offers 825 N for lighter, faster-cycling tasks. For applications that only need force in one direction, a single-rod SC cylinder is a simpler, lower-cost alternative.
This 180 mm stroke is well within the 1500 mm maximum for the 63 bore. When replacing an existing SCD63X180, match the bore, stroke, PT port thread, and any mounting accessories exactly. If you are adding rear tooling, the through-rod design gives better bearing support than a single rod, but sustained side loads still demand an external guide or a guided cylinder.
Double-rod checklist
Push and pull force are identical in a double-rod cylinder. At 0.5 MPa it is 1402 N, at 0.7 MPa it is 1962 N, and at the maximum operating pressure of 0.9 MPa it reaches 2523 N. The theoretical force at 1.0 MPa is 286 kgf.
Pick the SCD when you need equal force and speed in both directions, or when you want to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The dual-bearing support also provides better resistance to rod deflection than a single-rod cylinder, though it is not a replacement for a fully guided actuator under high side loads.
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