
The AirTAC Airtac SCD Standard Cylinder SCD40X160 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, 160mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X160 is a double-acting, double-rod pneumatic cylinder that provides perfectly symmetrical output force in both directions, delivering 528 N at 0.5 MPa and 950 N at the maximum 0.9 MPa operating pressure. Its 16 mm diameter rod extends from both ends, making it ideal for tasks requiring a rear rod connection for stroke sensing, a stopper bolt, or dual-sided tooling without adding extra guiding components.
With a 160 mm stroke, this model stays within the standard range for the 40 mm bore, which can be specified up to 1200 mm. The body length A(SCD) is 191 mm, and the adjustable air cushion at each end is 21 mm long, providing smooth deceleration. This cylinder uses PT1/4 ports and an M12x1.25 rod thread, and is built for filtered air at pressures from 0.15 to 1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD40X160 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 160 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. |
| ×160 | 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 pallet into position and simultaneously retract a stop pin on the opposite side, simplifying the pneumatic circuit for linear transfer stations.
With equal push and pull force of 528 N at 0.5 MPa, this cylinder applies identical clamping pressure whether extending or retracting, making it perfect for welding jigs that clamp from two sides with one actuator.
The dual-rod support naturally resists rotation, allowing the SCD40X160 to push components along a conveyor without the tooling plate twisting, a common issue with single-rod cylinders in long-stroke pusher applications.
Step up to the SCD50 bore for 825 N of force each way at 0.5 MPa, or down to the SCD32 for 345 N, selecting the bore that matches your required thrust without excessive energy consumption. If your application only needs force from one end, the single-rod SC series is a more cost-effective choice, as the double-rod design is specifically for tasks needing a rear rod connection or equal force in both directions.
For a direct replacement, match the 40 mm bore, 160 mm stroke, PT1/4 ports, and the specific SCD mounting accessory. At this 160 mm stroke, the through rod provides better bearing support than a single-rod cylinder, but for applications with significant radial loads, an external guide rail or a dedicated guided cylinder is still required to prevent rod bending.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The force is 528 N at 0.5 MPa, 739 N at 0.7 MPa, and reaches 950 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 108 kgf.
Choose the SCD when you need to mount a tool, sensor flag, or stopper on the rear rod, or when you require perfectly equal force and speed in both directions. The through rod also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a replacement for a fully guided actuator under heavy side loads.
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