The AirTAC Airtac SCD Standard Cylinder SCD80X50 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø80mm bore, 50mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X50 is a double-acting, double-rod pneumatic cylinder that outputs identical force in both directions—2268 N at 0.5 MPa—because the 25 mm rod subtracts the same area from each side of the piston. This symmetry is ideal for short-stroke tasks where a rear rod extension is needed for mounting a sensor flag or a secondary tool, and the through-rod design naturally improves bearing support compared to a single-rod cylinder.
With a 50 mm stroke, the unit stays compact while still providing the full 80 mm bore thrust. The body length A(SCD) is 257 mm, and the adjustable air cushion (28 mm) at each end decelerates the piston smoothly. Ports are PT3/8, and the rod ends carry an M20x1.5 thread for attaching tooling on both sides.
| Model | Airtac SCD Standard Cylinder SCD80X50 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 50 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 a single SCD80X50 move a workpiece carrier back and forth between two stations with equal speed and force in each direction.
Mount a sensor target on the rear rod extension to detect end-of-stroke position without interfering with the primary tooling on the front rod end.
The dual-rod design resists rotation, making it useful for a compact clamping or pressing jig where the piston rod must not twist during the 50 mm stroke.
Step up to the SCD100 bore if your application needs more than 3681 N at 0.5 MPa; step down to the SCD63 (1402 N at 0.5 MPa) if this force class is oversized. Because both rod ends extend, an SCD is the right choice when you need to do work on both sides of the cylinder or want the anti-rotation benefit of a through rod—but if you only need force from one end, the single-rod SC80 series is a simpler, lower-cost alternative. For direct replacement, match bore (80), stroke (50), PT3/8 port thread, the SCD mounting style, and the magnet option (-S) if equipped.
Double-rod checklist
Push and pull force are identical on this double-rod cylinder. At 0.5 MPa it produces 2268 N, at 0.7 MPa it delivers 3175 N, and at the maximum operating pressure of 0.9 MPa the force reaches 4082 N in both directions.
Choose the SCD when you need equal force and speed in both directions, want to mount tooling or sensors on a rear rod extension, or require the better rod guidance and anti-rotation that a through-rod design provides. If you only need force from one end, the single-rod SC series is typically more economical.
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