The AirTAC Airtac SCD Standard Cylinder SCD125X175 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, 175mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X175 is a double-acting, double-rod pneumatic cylinder that outputs an identical 5734 N of force in both directions at 0.5 MPa, thanks to its through-rod construction. With a 32 mm diameter rod extending from both end caps, this 125 mm bore actuator provides perfectly balanced thrust for tasks where asymmetric force would cause binding or misalignment.
At the full 0.9 MPa operating pressure, the output rises to 10321 N each way, making it a robust choice for heavy two-sided tooling. The 175 mm stroke is well within the 1500 mm maximum for this bore, and the adjustable air cushion (28 mm length) at each end decelerates the piston smoothly. This ISO 6430 class cylinder uses a PT1/2 port and an M27x2 rod thread.
| Model | Airtac SCD Standard Cylinder SCD125X175 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 175 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. |
| ×175 | 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 and rod on both ends allow a tooling plate to be mounted on each side, shuttling parts between two parallel conveyor lines with perfectly synchronized motion.
Delivers 10321 N of balanced force at 0.9 MPa from both ends, ideal for press-fit assembly or forming operations where the workpiece must be contacted from two opposite sides without a bending moment.
The rear rod extension provides a convenient mounting point for an external sensor flag or a mechanical hard stop, allowing precise end-of-stroke confirmation without interfering with the primary tooling on the front rod.
Step up to the SCD160 if your application demands more than the 5734 N (at 0.5 MPa) this 125 mm bore provides, as the 160 bore offers 9425 N. If you only need force from one end, a single-rod SC125 is lighter and more compact. For true guided motion under side load, a dedicated guided cylinder is required; the dual-rod design improves guidance but does not eliminate the need for external support on long strokes.
This model is a direct replacement for another AirTAC SCD125X175 with the same PT port thread, basic mounting, and no magnet. If you need position sensing, choose the -S magnet variant. For strokes of 300 mm or more, evaluate the unsupported rod length to prevent bending under compressive loads.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 5734 N, at 0.7 MPa it produces 8028 N, and at the maximum operating pressure of 0.9 MPa it produces 10321 N in both directions.
Choose the SCD125 when you need equal force and speed in both directions, or when you need to mount tooling, a sensor, or a stop on the rear rod. The through-rod also provides better resistance to side load than a single-rod cylinder, though it is not a substitute for a fully guided actuator under high moment loads.
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