The AirTAC Airtac SCD Standard Cylinder SCD100X300 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. Ø100mm bore, 300mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD100X300 is a double-acting, double-rod pneumatic cylinder that provides identical thrust in both directions—3681 N at 0.5 MPa—because the 25 mm rod passes through both end caps. This symmetry makes it ideal for applications where a tool or sensor must be mounted on the rear rod, or where balanced force and speed are required for a 300 mm stroke.
With a 100 mm bore and a body length A(SCD) of 263 mm, this cylinder uses a PT1/2 port and an M20x1.5 rod thread. Its adjustable air cushion (29 mm) decelerates the piston smoothly at each end, and the through-rod design provides better bearing support than a single-rod cylinder of the same size, reducing rod deflection in horizontal push-pull setups.
| Model | Airtac SCD Standard Cylinder SCD100X300 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 300 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| 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, 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 | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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). |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 rear rod can carry a counterweight or a second gripper, allowing a single SCD100X300 to shuttle parts between two stations with balanced timing and force.
Identical push and pull force at 0.9 MPa (6626 N) makes this cylinder suitable for jigs that require equal pressure from both sides to straighten or hold a workpiece without distortion.
Attach a sensor flag or cam to the rear rod extension to detect end-of-stroke position without interfering with the primary tooling on the front rod, keeping the sensing mechanism clean and accessible.
Choose the SCD100X300 when you need equal force in both directions and a 300 mm stroke. If your load requires more thrust, step up to the SCD125 bore, which offers 5734 N at 0.5 MPa. For applications needing force in only one direction, the single-rod SC100 cylinder may be a simpler choice, as it delivers a higher push force on the full-bore side. For direct replacement, match the 100 mm bore, 300 mm stroke, PT port thread, and basic mounting. At this 300 mm stroke, ensure the load is guided externally if side forces are present, as the long unsupported rod ends can experience bending under off-axis loads.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 3681 N, at 0.7 MPa it produces 5153 N, and at the maximum operating pressure of 0.9 MPa it produces 6626 N in both directions.
Select the SCD100 when you need equal speed and force in both directions, or when you need to mount tooling, a stopper, or a position sensor 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 heavy side loads.
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