The AirTAC Airtac SCD Standard Cylinder SCD32X400 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø12mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø32mm bore, 400mm stroke, PT1/8 ports and adjustable end cushioning.
The SCD32X400 is a double-acting, double-rod pneumatic cylinder that provides identical 345 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its through-rod design. This symmetry makes it a reliable choice for applications where balanced speed and force are critical, such as operating a two-sided tool or driving a transfer mechanism that requires a rear connection point.
With a 32 mm bore and a 12 mm rod protruding from both ends, the cylinder body length (A) is 187 mm. The adjustable air cushion, with a 21 mm cushion length, decelerates the piston smoothly at each end of the 400 mm stroke, reducing impact. It operates on 40 µm filtered air within a standard pressure range of 0.15 to 1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD32X400 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø32 mm |
| Rod diameter | Ø12 mm (both ends) |
| Stroke | 400 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 | 346 N | 346 N |
| 0.7 MPa | 484 N | 484 N |
| Max (@1.0 MPa) | 70 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). |
|---|---|
| 32 | Bore size in mm. |
| ×400 | 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 perform work on two opposite sides of a machine, such as simultaneously clamping two parts or operating two linked levers with perfectly synchronized motion.
With a rod fixed at both ends, the SCD32X400 can act as a stable, non-rotating pusher. The dual-rod support provides better guidance than a single-rod cylinder, making it suitable for light pressing or aligning components on a conveyor.
The rear rod provides a convenient mounting point for a sensor flag or cam. This allows end-of-stroke position sensing to be placed on the clean, back side of the cylinder, away from the primary tooling and workspace debris.
Select the SCD32X400 when your application needs a compact actuator with equal push-pull output. If you require more force, stepping up to the SCD40 bore provides 528 N at the same 0.5 MPa pressure. For tasks where only one side of the piston needs to do work, a single-rod SC series cylinder is a simpler, more cost-effective alternative. This double-rod unit is not a guided cylinder; any significant side load on the exposed 12 mm rods will require an external guide rail.
To replace an existing SCD32X400, match the 32 mm bore, 400 mm stroke, PT port thread, and basic mounting style. If your current cylinder has a magnet for sensors, ensure the replacement includes the -S suffix. For strokes of 300 mm or more, always assess the potential for rod buckling under compressive loads and consider adding an external guide or switching to a guided cylinder for long unsupported pushes.
Double-rod checklist
Because the piston rod passes through both end caps, the effective pressure area is identical on both sides. The SCD32X400 produces an equal force of 345 N when extending and retracting at 0.5 MPa, 483 N at 0.7 MPa, and 621 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD double-rod type when you need identical force and speed in both directions, or when you need a rear rod extension to mount a tool, bracket, or sensor. The dual-rod support also offers better resistance to bending moments than a single-rod cylinder, though it is not a substitute for a fully guided actuator under high side loads.
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