The AirTAC Airtac SCD Standard Cylinder SCD125X80 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, 80mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X80 is a double-acting, double-rod pneumatic cylinder that outputs an identical 5734 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its through-rod design which equalizes the effective piston area on both sides. This 80 mm stroke model features a substantial 32 mm diameter rod protruding from both end caps, providing inherent anti-rotation and the ability to mount tooling or sensors on the rear rod.
With a body length A(SCD) of 291 mm, this ISO 6430 class cylinder uses PT1/2 ports and offers an adjustable air cushion of 28 mm at each end to decelerate the piston smoothly. At the maximum operating pressure of 0.9 MPa, the thrust reaches 10321 N in either direction, making it a powerful symmetric actuator for heavy-duty industrial tasks.
| Model | Airtac SCD Standard Cylinder SCD125X80 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 80 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. |
| ×80 | 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 force in both directions makes the SCD125X80 perfect for shuttle tables that move a heavy pallet or fixture between two stations, ensuring consistent speed and power in each leg of the motion.
With a 32 mm through rod supported by bearings in both end caps, this cylinder offers superior resistance to rod rotation. Use it as a press ram where tooling alignment must be maintained without adding an external guide.
The protruding rear rod provides a convenient, clean surface to mount a sensor flag or a mechanical trip dog for external limit switches, keeping the sensing mechanism away from the primary tooling on the front rod.
Select the SCD125X80 when your application demands equal, high-force bidirectional movement. If you need more force, the SCD160 bore provides 9425 N at 0.5 MPa; for a lighter, more compact solution, the SCD100 bore delivers 3681 N. This double-rod cylinder is ideal for tasks requiring a rear rod connection, but if you only need a single push-pull point, a standard single-rod SC series cylinder may be a simpler fit.
For a drop-in replacement, match the 125 mm bore, 80 mm stroke, PT port thread, and SCD mounting style. If you require position sensing, choose the -S magnet option to use CMSG/DMSG sensors. For strokes of 300 mm or more, always assess the unsupported rod length for potential bending under side loads, and consider adding an external guide rail.
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 is 8028 N, and at the maximum operating pressure of 0.9 MPa, the force is 10321 N in both directions.
Choose the SCD when you need identical force and speed in both directions, or when you need to attach a load, tooling, or sensor to a rear rod. The through rod also provides better guidance and anti-rotation than a single-rod SC cylinder, but it is not a substitute for a fully guided cylinder under significant side loads.
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