The AirTAC Airtac SCD Standard Cylinder SCD125X150S 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, 150mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X150S is a double-acting, double-rod pneumatic cylinder built for applications demanding identical force and speed in both directions. With a 125 mm bore and a 32 mm rod passing through both end caps, it outputs a balanced 5734 N of thrust each way at 0.5 MPa, making it ideal for symmetrical transfer mechanisms and two-sided tooling.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for contactless position feedback. The adjustable air cushion at each end (28 mm length) decelerates the piston smoothly, and the PT1/2 ports ensure straightforward plumbing. Its body length A(SCD) is 291 mm.
| Model | Airtac SCD Standard Cylinder SCD125X150S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 150 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. |
| ×150 | 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 5734 N push and pull force at 0.5 MPa makes this cylinder perfect for shuttle tables that move a fixture or workpiece between two stations with consistent speed and power in both directions.
Use the rear rod extension to operate a secondary clamp or support mechanism in sync with the main tool, ensuring perfectly balanced pressure distribution on large panels or assemblies.
The built-in magnet (-S) lets you mount CMSG/DMSG sensors on either end of the barrel. The rear rod provides a convenient, protected location for a sensor flag, simplifying end-of-stroke detection logic.
Choose the SCD125 when you need the robust 5734 N (at 0.5 MPa) equal push/pull force for dual-ended operations. If your load requires less force, the SCD100 bore provides 3681 N; for heavier symmetrical tooling, step up to the SCD160 at 9425 N. A double-rod cylinder is the right choice when you need to mount a tool, stopper, or sensor flag on the rear rod, or require better guidance than a single-rod unit, though it is not a substitute for a fully guided cylinder under high side loads.
For a direct replacement, match the 125 mm bore, 150 mm stroke, PT port thread, basic mounting, and the integrated magnet (-S suffix). If your application only requires force from one end, a single-rod SC series cylinder is a more economical alternative.
Double-rod checklist
Because the piston rod passes through both end caps, the effective pressure area is identical on both sides. The SCD125X150S delivers 5734 N pushing and 5734 N pulling at 0.5 MPa, 8028 N in both directions at 0.7 MPa, and 10321 N at the maximum operating pressure of 0.9 MPa.
Select the SCD double-rod design when you need equal force and speed for both extend and retract strokes, or when you must mount tooling, a mechanical stop, or a sensor cam on the rear rod. It also provides superior rod bearing support compared to a single-rod cylinder, reducing deflection, but it requires more installation space due to the rod protruding from both ends.
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