The AirTAC Airtac SCD Standard Cylinder SCD50X180S 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 SCD50X180S is a double-acting, double-rod pneumatic cylinder that delivers identical push and pull force of 825 N at 0.5 MPa (1484 N at 0.9 MPa) thanks to its through-rod design. Both ends feature a 20 mm diameter rod, making it ideal for applications where you need to mount tooling, flags, or stops on the rear side while maintaining perfectly balanced motion.
This model includes a built-in magnet (denoted by the -S suffix), so you can directly clamp CMSG, DMSG, or EMSG reed and solid-state sensors onto the tie-rod barrel for reliable end-of-stroke detection. With a 180 mm stroke, adjustable pneumatic cushioning (21 mm length), and PT1/4 ports, it operates smoothly across a 30-800 mm/s speed range.
| Model | Airtac SCD Standard Cylinder SCD50X180S |
|---|---|
| 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.
The rod extending from both caps lets you push a workpiece into a station with the front end while the rear end simultaneously pulls the next part into position, doubling throughput in a shuttle table.
Equal force in both directions ensures a symmetrical clamp or press action. The rear rod can also trigger a limit switch via the integrated magnet for precise cycle confirmation.
The dual-rod support provides better resistance to twisting than a single-rod cylinder, making it a solid choice for pushing components along a track where rod rotation must be minimized without adding an external guide.
Choose the SCD50 bore when your application requires balanced force around 825 N at standard plant pressure. If you need more thrust, stepping up to the SCD63 provides 1402 N at the same 0.5 MPa, while the SCD40 delivers 528 N for lighter, faster tasks. This double-rod unit is the right pick over a single-rod SC when you need to attach a rear cam, stopper bolt, or sensor flag, or when the extra rod bearing support helps reduce deflection in a non-rotating setup.
For direct replacement, match the 50 mm bore, 180 mm stroke, PT port thread, and the -S magnet option. The SCD family uses a tie-rod construction and accepts FA, LB, or TC mounting accessories from the F-SC50 series. If your stroke pushes toward the 1200 mm maximum for this bore, consider an external guide rail to protect the extended rod from bending under side load.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa you get 825 N, at 0.7 MPa you get 1154 N, and at the maximum operating pressure of 0.9 MPa the force is 1484 N in both directions.
Pick the SCD when you need equal speed and force in both directions, or when you require a rear rod extension to mount a sensor flag, mechanical stop, 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 unit under high side loads.
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