The AirTAC Airtac SCD Standard Cylinder SCD80X50S 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.
This SCD80X50S double-rod pneumatic cylinder provides a balanced 2268 N of force in both directions at 0.5 MPa, thanks to its through-rod design where the 25 mm rod subtracts equally from both piston faces. The short 50 mm stroke, combined with the robust Ø25 rod protruding from both ends, makes it ideal for compact two-sided tooling or a rear-mounted sensor flag setup.
The built-in magnet (denoted by the -S suffix) allows easy clamping of CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for precise, non-contact end-of-stroke detection. With a body length A(SCD) of 257 mm, an adjustable pneumatic cushion of 28 mm, and PT3/8 ports, it's a genuine AirTAC unit built for reliable, symmetric actuation.
| Model | Airtac SCD Standard Cylinder SCD80X50S |
|---|---|
| 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 ends allows a single cylinder to push a part into a fixture on the forward stroke and retract a stop pin on the rear stroke, simplifying compact shuttle mechanisms.
With the built-in magnet, a sensor can be placed on the rear rod to confirm full retraction, a common setup in presses where the front end is inaccessible or carries the main tooling.
Use the 2268 N of equal push-pull force to mechanically link two opposing guards or gates, ensuring they open and close in perfect synchronization from a single air circuit.
Choose this 80 mm bore when your application needs roughly 2268 N of balanced force each way at 0.5 MPa. If you require less force, stepping down to the SCD63 bore provides 1402 N at the same pressure. For applications needing a longer stroke, this 80 mm bore can be extended up to a 1500 mm max standard stroke. Always ensure your replacement matches the bore, 50 mm stroke, PT port thread, and the SCD double-rod configuration; the built-in magnet is critical if your existing setup uses barrel-mounted sensors. For strokes of 300 mm or more, evaluate the unsupported rod length for potential bending under side loads and consider an external guide or a guided cylinder.
Double-rod checklist
Because it's a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it's 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 identical force and speed in both directions, or when you need to mount tooling, a stop, or a sensor target on the rear rod. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a substitute for a fully guided unit under high side loads.
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