The AirTAC Airtac SCD Standard Cylinder SCD125X350S 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, 350mm stroke, PT1/2 ports and adjustable end cushioning.
This SCD125X350S double-rod pneumatic cylinder provides perfectly balanced bidirectional force, outputting 5734 N in both extend and retract at 0.5 MPa. Because the 32 mm rod passes through both end caps, the effective piston area is identical on each side, making it the go-to choice when a machine axis demands symmetric thrust and speed for tooling mounted at either end.
The 350 mm stroke operates well within the 1500 mm maximum for this 125 mm bore, and the tie-rod construction includes an adjustable air cushion (28 mm length) at each end to decelerate the piston smoothly. An integrated magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for non-contact position feedback, while the standard PT ports and TPU seals suit general industrial environments from -20 to +70 °C.
| Model | Airtac SCD Standard Cylinder SCD125X350S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 350 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. |
| ×350 | 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 5734 N at 0.5 MPa makes this cylinder ideal for shuttle tables that move a fixture or pallet between two stations with identical speed and power in each direction.
Use the through-rod to mount a clamp on one end and a reaction plate on the other, applying perfectly centered, equal pressure for assembly presses or light straightening fixtures.
The built-in magnet lets you mount CMSG/DMSG sensors on the barrel to detect piston position, while the rear rod extension provides a physical flag for a secondary hard-wired limit switch.
Select this SCD125X350S when your application needs roughly 5.7 kN of force in both directions. If you require a higher thrust, stepping up to the 160 mm bore provides 9425 N at the same 0.5 MPa pressure; for a lighter, more compact solution, the 100 mm bore delivers 3681 N. Remember that a double-rod cylinder is not a substitute for a guided cylinder—if the 350 mm stroke exposes the rod to significant side loads, add an external linear guide to protect the rod bearings from premature wear.
This model is a direct dimensional and functional replacement only for another AirTAC SCD125X350-S cylinder matching the 125 mm bore, 350 mm stroke, PT port thread, basic mounting, and integrated magnet. It cannot be swapped with a single-rod SC cylinder without redesigning the tooling layout, as the rear rod extension is absent on the SC series.
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 SCD when you need identical force and speed in both directions, or when you need to mount tooling, a stopper, or a sensor flag on the rear rod. The through-rod also provides better guidance and anti-rotation support than a single-rod cylinder, though it is not a replacement for a fully guided actuator under heavy side loads.
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