The AirTAC Airtac SCD Standard Cylinder SCD125X230S 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, 230mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X230S is a double-acting, double-rod pneumatic cylinder delivering identical force in both directions—5734 N at 0.5 MPa—because the 32 mm rod passes through both end caps, subtracting the same area on each side. With a 230 mm stroke and a body length A of 291 mm, it suits mid-range transfer tasks where a rear rod extension is needed for mounting a sensor flag or secondary tooling.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The adjustable air cushion at each end (28 mm) decelerates the piston, and the PT1/2 ports with M27x2 rod threads handle the 10321 N thrust available at the 0.9 MPa maximum operating pressure.
| Model | Airtac SCD Standard Cylinder SCD125X230S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 230 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. |
| ×230 | 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 through-rod design allows tooling to be mounted on both ends, enabling the cylinder to push a workpiece on the forward stroke and pull a separate fixture on the return stroke with exactly the same 5734 N force.
With the built-in magnet, a CMSG or DMSG sensor mounted on the rear tie-rod detects the retracted position via the rear rod extension, keeping the front end clear for the main tooling interface.
The dual-rod support provides inherent anti-rotation for a pusher plate, helping maintain alignment in a shuttle table without needing an external guide for light, axially-centered loads.
Select the SCD125 bore when your application requires around 5734 N of balanced force each way at standard plant pressure. If you need less force, stepping down to the SCD100 bore provides 3681 N at 0.5 MPa in a lighter package. For applications with significant side loading on the extended rod, a through-rod design offers better bearing support than a single-rod SC cylinder, but a dedicated guided cylinder with external rails is the correct choice for heavy transverse forces. This SCD125X230S is a direct dimensional and performance replacement for another AirTAC SCD125 double-rod cylinder of the same 230 mm stroke, provided the port thread is PT, the magnet option is present, and the mounting style matches.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 5734 N, at 0.7 MPa it outputs 8028 N, and at the maximum operating pressure of 0.9 MPa it reaches 10321 N. The theoretical force at 1.0 MPa is 1169 kgf.
Choose an SCD when you need identical force and speed in both directions, or when you need a rear rod extension to mount a sensor cam, a mechanical stop, or secondary tooling. 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 high side loads.
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