The AirTAC Airtac SCD Standard Cylinder SCD50X100S 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, 100mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X100S is a tie-rod double-rod cylinder, delivering a balanced 825 N of thrust in both directions at 0.5 MPa because the 20 mm rod passes through both end caps. This symmetry eliminates force differentials, making it ideal for tasks where a return stroke must match the push stroke precisely.
With a 100 mm stroke and a body length A of 207 mm, this model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the barrel for reliable end-of-stroke detection. The adjustable air cushion at each end decelerates the piston smoothly within a 21 mm cushion zone.
| Model | Airtac SCD Standard Cylinder SCD50X100S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 100 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. |
| ×100 | 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 force in both directions ensures smooth, consistent motion when shuttling parts between two fixed stations, preventing speed mismatches that could cause product damage.
With a rod extending from both ends, the dual bearing support inherently resists rotation, making it suitable for pushing applications where the tooling must maintain a fixed angular orientation without an external guide.
The integrated magnet allows sensors to be mounted on the barrel to detect piston position. The rear rod can also carry a flag or cam to trigger an external limit switch for a redundant or secondary control signal.
Choose this 50 mm bore when your application needs equal push and pull force around 825 N at standard plant pressure. If you require more thrust, stepping up to the SCD63 (1402 N at 0.5 MPa) provides a significant force increase without a large jump in dimensions. For purely single-sided tooling, a single-rod SC cylinder is a simpler choice. This double-rod design offers better guidance than a single rod but is not a substitute for a fully guided cylinder under heavy side loads.
As a direct replacement, match another SCD50 cylinder with the same 100 mm stroke, PT port thread, and a magnet-equipped barrel. The built-in magnet here is essential for sensor compatibility, so a non-magnet SCD50X100 would not be a plug-and-play swap if your control system relies on barrel-mounted reed switches.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is calculated by subtracting the 20 mm rod area from the 50 mm bore area. This results in a force of 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
Select the SCD when your application benefits from a rod on both sides. This is common for mounting tooling on both ends, using the rear rod for a stroke-limiting stopper or sensor flag, or when you need perfectly balanced push and pull forces. The dual-rod design also provides better inherent rod support and anti-rotation than a single-rod cylinder.
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