The AirTAC Airtac SCD Standard Cylinder SCD50X90 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, 90mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X90 is a double-acting, double-rod pneumatic cylinder that provides identical 825 N output force in both directions at 0.5 MPa, rising to 1484 N at 0.9 MPa. Its 20 mm diameter rod extends through both end caps, giving you a rear rod end for mounting sensors, cams, or secondary tooling while maintaining balanced thrust.
With a 90 mm stroke and PT1/4 ports, this 50 mm bore tie-rod cylinder fits compact two-sided actuation tasks. The adjustable air cushion at each end (21 mm long) decelerates the piston smoothly, and the body length A(SCD) is 207 mm. It operates on filtered air from 0.15 to 1.0 MPa across a -20 to +70 °C range.
| Model | Airtac SCD Standard Cylinder SCD50X90 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 90 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. |
| ×90 | 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 shuttling parts between two stations, where consistent speed and force in both directions are critical for reliable hand-off.
The dual-rod design provides inherent anti-rotation, allowing the SCD50X90 to push components squarely without a separate guide, as long as side loads are minimal.
The protruding rear rod offers a convenient attachment point for a sensor flag or limit switch cam, enabling end-of-stroke detection without interfering with the front tooling.
Choose this 50 mm bore when your application needs around 825 N of force each way at standard plant pressure. If you require more thrust, stepping up to the 63 mm bore provides 1402 N at the same 0.5 MPa. For tasks that only need force from one side, the single-rod SC series is lighter and more compact.
This is a direct replacement for an existing AirTAC SCD50 cylinder. To ensure compatibility, match the 50 mm bore, 90 mm stroke, PT port thread, basic mounting style, and confirm whether a magnet is needed. For strokes significantly longer than this, consider external guides to protect the through-rod from side loads.
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 is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N.
You would choose the SCD when you need equal force and speed in both directions, or when you require a rear rod extension to mount tooling, a brake, or a position sensor. The through-rod also provides better guidance and bending resistance than a single-rod cylinder of the same bore.
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