The AirTAC Airtac SCD Standard Cylinder SCD40X75 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 75mm stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCD40X75 is a double-acting, double-rod pneumatic cylinder that provides an identical 528 N of thrust in both extend and retract strokes at 0.5 MPa. Because the 16 mm piston rod passes through both end caps, the effective pressure area is equal on each side, making this actuator ideal for applications where consistent speed and force symmetry are critical.
With a 75 mm stroke and a body length A(SCD) of 191 mm, this cylinder fits compact dual-tooling setups. The adjustable pneumatic cushion on each end cap, with a 21 mm cushion length, decelerates the piston smoothly, while the PT1/4 port ensures straightforward pneumatic connections.
| Model | Airtac SCD Standard Cylinder SCD40X75 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 75 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 through rod allows tooling to be mounted on both ends, enabling a single SCD40X75 to perform a push operation on one side and a pull operation on the other simultaneously.
With equal 528 N force in both directions, this cylinder is well-suited for clamping fixtures where the workpiece must be engaged and released with identical pressure from a central point.
Use the rear rod extension to mount a sensor flag for end-of-stroke detection, making the SCD40X75 a reliable actuator for small parts transfer and sorting stations.
Select the SCD40X75 when your mechanism requires balanced push-pull force from a compact tie-rod cylinder. If you need higher force, the SCD50 bore steps up to 825 N at 0.5 MPa. For applications needing force in only one direction, a single-rod SC series cylinder may be more cost-effective. A genuine AirTAC replacement must match the 40 mm bore, 75 mm stroke, PT thread, and basic mounting configuration exactly. For strokes of 300 mm or more, evaluate the rod's unsupported length under compressive load to prevent buckling.
Double-rod checklist
The push and pull force is identical for this double-rod cylinder. At 0.5 MPa it is 528 N, at 0.7 MPa it is 739 N, and at the maximum operating pressure of 0.9 MPa it reaches 950 N.
Choose the SCD when you need equal force and speed in both directions, or when you need to mount tooling, a stopper, or a sensor flag on the rear rod. The through rod also provides better guidance and anti-rotation support than a single-rod cylinder, though it is not a replacement for a fully guided actuator under high side loads.
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