The AirTAC Airtac SCD Standard Cylinder SCD125X700 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 700mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X700 is a double-acting, double-rod pneumatic cylinder that produces identical push and pull thrust from both ends, starting at 5734 N at 0.5 MPa. Its through-rod design, built around a 32 mm diameter piston rod, removes the force imbalance of single-rod cylinders, making it ideal for two-sided tooling, symmetrical transfer mechanisms, and applications where a rear rod extension is needed for a stopper bolt or external sensor flag.
This 125 mm bore tie-rod actuator is an ISO 6430 class cylinder with a 700 mm stroke, well within its 1500 mm maximum standard stroke. The body length A(SCD) is 291 mm, and the integrated adjustable air cushion on both ends (28 mm cushion length) decelerates the piston smoothly. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and uses PT1/2 ports with an M27x2 rod thread.
| Model | Airtac SCD Standard Cylinder SCD125X700 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 700 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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, 28 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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). |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 push-pull force of 10321 N at 0.9 MPa drives tooling or clamps mounted on both ends of the through-rod with perfect symmetry, eliminating complex linkage adjustments.
A 700 mm stroke moves a shuttle between two stations with consistent speed in both directions. The rear rod can carry a sensor flag for end-of-stroke confirmation without adding length to the front tooling.
The dual-rod support provides inherent anti-rotation stability for a 125 mm bore pusher plate, keeping it aligned during a long 700 mm advance without a separate external guide rail for light side loads.
Choose the SCD125X700 when you need balanced bidirectional force in a robust tie-rod package. If your load requires less thrust, the SCD100 bore delivers 3681 N at 0.5 MPa with a 25 mm rod. For higher force, the SCD160 bore steps up to 9425 N. This double-rod cylinder is not a guided actuator; if your 700 mm stroke involves significant side loads, pair it with an external linear guide or select a dedicated guided cylinder to prevent rod bending.
As a drop-in replacement, match the 125 mm bore, 700 mm stroke, PT1/2 port thread, and the specific SCD mounting accessory (basic, FA, LB, or TC). To enable barrel-mounted position sensors, specify the -S magnet option. This model uses the default TPU seal and PT thread.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is identical on both sides. The force is 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and 10321 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 1169 kgf.
Choose the SCD when your application needs equal force and speed in both directions, or when you need to mount tooling, a mechanical stop, or a position sensor on the rear rod. The through-rod also provides better guidance and bending resistance than a single-rod cylinder of the same bore, though it is not a substitute for a fully guided actuator under heavy side loads.
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