The AirTAC Airtac SCD Standard Cylinder SCD50X180 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. Ø50mm bore, 180mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X180 double-rod pneumatic cylinder delivers perfectly balanced bidirectional force, outputting 825 N both extending and retracting at 0.5 MPa thanks to its through-rod design. With a 20 mm rod protruding from both end caps, it provides equal speed and thrust in each direction, ideal for applications where the rear rod can carry a sensor flag, stopper, or secondary tooling.
This 50 mm bore model uses a PT1/4 port and features a 21 mm adjustable air cushion at each end to decelerate the piston smoothly. The retracted body length A is 207 mm, and the standard TPU seal operates reliably from -20 to +70 °C. It is a genuine AirTAC tie-rod cylinder built for symmetric motion tasks.
| Model | Airtac SCD Standard Cylinder SCD50X180 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 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, 21 mm |
| Max stroke | Up to 1200 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 | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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). |
|---|---|
| 50 | 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.
Moves a shuttle plate back and forth with equal force and speed in both directions, using the rear rod to trigger end-of-stroke sensors.
Carries a forming tool on the front rod and an ejector pin on the rear rod, performing two operations in one actuator cycle.
The dual-rod support provides better resistance to rod rotation than a single-rod cylinder when pushing an unguided load.
Choose the SCD50X180 when you need identical push and pull output; at 0.5 MPa it provides 825 N in both directions. If your load requires more force, stepping up to the 63 mm bore delivers 1402 N each way at the same pressure. For single-direction work where only one rod end is needed, the standard SC single-rod series is a simpler, more compact alternative.
To replace an existing unit, match the 50 mm bore, 180 mm stroke, PT port thread, and basic mounting. Adding the -S magnet option enables CMSG/DMSG sensor mounting. For strokes over 300 mm on this bore, consider an external guide rail to protect the 20 mm rod from bending under side loads.
Double-rod checklist
Because the piston rod passes through both ends of the cylinder, the effective pressure area is identical on both sides. The SCD50X180 produces 825 N pushing and 825 N pulling at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
Select the SCD when your application needs equal force and speed in both directions, or when you need a rear rod extension to mount sensors, cams, or secondary tooling. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a replacement for a fully guided actuator under high side loads.
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