The AirTAC Airtac SCD Standard Cylinder SCD250X160S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø50mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø250mm bore, 160mm stroke, PT1" ports and adjustable end cushioning.
The SCD250X160S is a heavy-duty double-rod pneumatic cylinder that provides identical force in both directions, outputting 23562 N at 0.5 MPa and up to 42412 N at the maximum operating pressure of 0.9 MPa. Its 50 mm diameter rod extends from both ends, subtracting the same area on each side to guarantee perfectly balanced thrust for large-scale tooling that must push and pull with equal authority.
This model features a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be mounted directly on the tie-rod barrel for non-contact position feedback. With a 160 mm stroke, adjustable air cushioning (40 mm length) at both ends, and a robust body length A of 435 mm, it is engineered for demanding industrial tasks where symmetric force and sensor integration are non-negotiable.
| Model | Airtac SCD Standard Cylinder SCD250X160S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Rod diameter | Ø50 mm (both ends) |
| Stroke | 160 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 | 23562 N | 23562 N |
| 0.7 MPa | 32987 N | 32987 N |
| Max (@1.0 MPa) | 4805 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). |
|---|---|
| 250 | Bore size in mm. |
| ×160 | 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 large pallets or steel sheets between conveyor lanes with equal speed and force in both directions, using the rear rod for a counterbalance or secondary tooling plate.
Applies 23.5 kN of synchronized clamping force from both ends of the cylinder simultaneously, ideal for large weld fixtures or lamination presses.
The built-in magnet enables precise end-of-stroke detection via barrel-mounted sensors, critical for sequencing in automated heavy machinery.
Step down to the SCD200 bore if 15080 N at 0.5 MPa covers the load, which reduces the rod diameter to 40 mm and the body length to 362 mm. If the application only needs force in one direction, a single-rod SC250 cylinder will deliver a higher push force because the full bore area is available on the extend stroke. For replacement, match bore (250), stroke (160), PT port thread, basic mounting, and the -S magnet option exactly to another AirTAC SCD double-rod unit. At this stroke, the dual 50 mm rods provide excellent inherent guidance, but any significant side load still requires an external linear guide or a dedicated guided cylinder to protect the rod bearings.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 23562 N, at 0.7 MPa it produces 32987 N, and at the maximum operating pressure of 0.9 MPa it reaches 42412 N in both directions.
Choose the SCD when you need perfectly equal force and speed in both directions, or when you need to mount tooling, a stop, or a sensor flag on the rear rod. The through-rod design also provides better bearing support than a single-rod cylinder, though it is not a substitute for an external guide under high side loads.
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