The AirTAC Airtac SCD Standard Cylinder SCD50X210S 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, 210mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X210S 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. This symmetry eliminates force differentials in push-pull applications, and the 210 mm stroke—a non-standard length—provides a tailored reach for specific tooling setups.
Equipped with a built-in magnet (-S suffix), this model is ready for CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The cylinder uses a PT1/4 port, has a 21 mm adjustable air cushion, and operates within a standard -20 to +70 °C temperature range with its default TPU seals.
| Model | Airtac SCD Standard Cylinder SCD50X210S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 210 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. |
| ×210 | 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 cylinder ideal for shuttle tables where a workpiece carrier must be moved with the same power in both directions, ensuring consistent cycle times.
The through-rod design allows a sensor flag or cam to be mounted on the rear rod end. Combined with the built-in magnet on the barrel, this provides dual confirmation of piston position for safety-critical sequences.
With a 20 mm rod supported at both ends, this cylinder offers superior resistance to rod rotation compared to a single-rod type, making it suitable for guiding simple pressing or stamping tools without a dedicated guide block.
Choose this 50 mm bore model when your application needs a balanced 825 N (at 0.5 MPa) in both extend and retract. If you require more force, stepping up to the SCD63 bore provides 1402 N each way, while the SCD40 bore offers a lighter 528 N. For applications that only need force in one direction, a single-rod SC series cylinder is a more cost-effective choice.
At a 210 mm stroke, ensure the load is guided externally, as the dual-rod design improves guidance but does not eliminate the risk of rod bending under side loads. As a direct replacement, match this model to another AirTAC SCD50 with the same 210 mm stroke, PT1/4 port, basic mounting, and the -S magnet option.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa, it delivers 825 N; at 0.7 MPa, it delivers 1154 N; and at the maximum operating pressure of 0.9 MPa, it delivers 1484 N in both directions.
You would choose the SCD when you need a cylinder that provides the exact same force and speed in both directions, or when you need to mount a tool, stopper, or sensor flag on the rear rod. The dual-rod support also provides better guidance and anti-rotation properties than a single-rod cylinder.
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