The AirTAC Airtac SCD Standard Cylinder SCD160X250 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø40mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø160mm bore, 250mm stroke, PT3/4 ports and adjustable end cushioning.
The SCD160X250 is a double-acting, double-rod pneumatic cylinder that provides exactly the same force in both directions—9425 N at 0.5 MPa and 16964 N at 0.9 MPa—because the 40 mm rod passes through both end caps. This symmetry eliminates force differentials in bidirectional tooling, making every cycle predictable whether you are pushing or pulling.
With a 250 mm stroke on a 160 mm bore, the retracted body length A(SCD) is 352 mm, and the adjustable air cushion at each end is 29 mm to decelerate heavy loads smoothly. The PT3/4 ports and M36x2 rod threads handle high flow and robust mechanical connections for large fixtures.
| Model | Airtac SCD Standard Cylinder SCD160X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø160 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 250 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 29 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 | 9425 N | 9425 N |
| 0.7 MPa | 13195 N | 13195 N |
| Max (@1.0 MPa) | 1922 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). |
|---|---|
| 160 | Bore size in mm. |
| ×250 | 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 equal 9425 N push and pull force at 0.5 MPa lets a single SCD160X250 clamp a part from either side without asymmetric deflection, perfect for welding jigs and assembly nests.
A rear rod extension can carry a counterbalance or secondary tool plate, while the front rod moves the main 250 mm stroke shuttle, keeping the load guided at both ends.
Mount tooling on both rod ends to perform a two-stage forming or straightening operation in one cycle, using the through-rod's inherent alignment to maintain concentricity.
Step up to the SCD200 (15080 N at 0.5 MPa) if you need more force, or down to the SCD125 (5734 N) for a lighter, more compact package. If your application only needs force from one end, a single-rod SC160 will be lighter and shorter. For a true drop-in replacement, match bore, 250 mm stroke, PT3/4 ports, SCD mounting accessory, and the magnet option if your existing unit has a -S suffix. At this stroke length, ensure the dual-rod assembly is not subjected to significant side load; use an external guide rail for cantilevered or offset loads.
Double-rod checklist
Push and pull force are identical because the rod area is subtracted from both sides. At 0.5 MPa you get 9425 N, at 0.7 MPa it is 13194 N, and at the maximum operating pressure of 0.9 MPa the force reaches 16964 N. The theoretical force at 1.0 MPa is 1922 kgf.
Not directly, because the SCD160X250 has a rod protruding from the rear cap, making the overall length longer (body length A is 352 mm) and requiring clearance behind the cylinder. The force output is also lower than an SC160 in push mode. Only use it to replace another SCD160 with the same bore, 250 mm stroke, PT3/4 ports, and mounting type.
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