The AirTAC Airtac SCD Standard Cylinder SCD50X1100S 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, 1100mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X1100S is a double-acting, double-rod pneumatic cylinder that outputs an identical 825 N of force in both directions at 0.5 MPa, thanks to its 20 mm rod passing through both end caps. With a 1100 mm stroke, this model is well within the 1200 mm maximum standard stroke for the 50 mm bore, making it a stock-configurable option for long-travel, two-sided tooling tasks.
This variant includes a built-in magnet (-S suffix), allowing easy mounting of CMSG, DMSG, or EMSG sensors directly on the tie-rod barrel for contactless position feedback. The body length A(SCD) is 207 mm, and the adjustable air cushion at each end (21 mm) decelerates the piston smoothly, protecting end caps during high-cycle, bidirectional operation.
| Model | Airtac SCD Standard Cylinder SCD50X1100S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 1100 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. |
| ×1100 | 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 push/pull force of 825 N at 0.5 MPa makes this 1100 mm stroke cylinder ideal for long shuttles that move a workpiece carrier between two stations, with tooling mounted on both rod ends.
With the built-in magnet, a sensor can be clamped on the rear barrel to detect end-of-stroke via the rear rod, a clean solution when the front end is inaccessible or crowded with tooling.
The dual-rod support provides better guidance than a single-rod cylinder, making it suitable for pushing components into a fixture where rod rotation must be minimized without a full external guide.
Choose the SCD50 bore when your application needs around 825 N of balanced thrust at standard plant air pressure. If you require more force, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa. For purely single-sided push tasks where a rear rod is unnecessary, the standard SC single-rod series is a more compact and cost-effective alternative. This SCD model is a direct dimensional replacement for any AirTAC SCD50 double-rod cylinder sharing the same 1100 mm stroke, PT port thread, basic mounting, and magnet option.
At a 1100 mm stroke, the long unsupported rod on both ends is susceptible to bending under side loads. For applications where the rod must carry any transverse force, an external linear guide or a dedicated guided cylinder should be used to prevent rod buckling and premature bearing wear.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N in both directions.
You choose an SCD when you need to mount a tool, stopper, or sensor flag on the rear rod, or when you require perfectly equal force and speed in both directions. The through-rod design also provides better support against rod deflection compared to a single-rod cylinder of the same bore.
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