The AirTAC Airtac SCD Standard Cylinder SCD50X175 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, 175mm stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCD50X175 is a double-acting, double-rod pneumatic cylinder that provides perfectly symmetrical force output in both directions, delivering 825 N of thrust each way at 0.5 MPa. With a 175 mm stroke and a 20 mm diameter rod extending from both ends, it is purpose-built for tasks requiring identical push and pull performance, such as operating dual tooling or providing a rear connection point for a sensor flag.
This 50 mm bore model features PT1/4 ports and an adjustable air cushion of 21 mm at each end to decelerate the piston smoothly. The body length A(SCD) is 207 mm, making the overall retracted length longer than a comparable single-rod cylinder due to the through-rod design. It operates on filtered air from 0.15 to 1.0 MPa, with a maximum theoretical force of 168 kgf at 1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD50X175 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 175 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. |
| ×175 | 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 equal 825 N push and pull force makes this cylinder ideal for linear transfer units where a shuttle must move a load with identical power in both directions.
The rear rod extension provides a convenient hardpoint to mount a sensor flag or cam for end-of-stroke detection without interfering with the front tooling.
Mount pressing or forming tools on both rod ends to perform simultaneous operations on two workpieces, doubling throughput in a single cycle.
Select the SCD50X175 when your application demands equal force and speed in both directions from a compact double-rod package. If you need more thrust, stepping up to the SCD63 bore provides 1402 N at 0.5 MPa, while the SCD40 offers a lighter 528 N option. For applications where only a single-ended push is required, the standard SC single-rod series is a more economical choice that provides a higher push force on the full-bore side. A direct replacement must match the 50 mm bore, 175 mm stroke, PT port thread, basic mounting, and the absence of a magnet.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 825 N, at 0.7 MPa it's 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N in both directions.
Choose the SCD when you need equal force and speed extending and retracting, or when you need to mount tooling or a sensor on the rear rod. The through-rod also provides better support for the piston, reducing uneven wear compared to a single rod under certain conditions, though it is not a substitute for a fully guided cylinder under high side loads.
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