The AirTAC Airtac SCD Standard Cylinder SCD125X75 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, 75mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X75 is a double-acting, double-rod pneumatic cylinder that provides identical thrust in both directions, outputting 5734 N at 0.5 MPa and reaching 10321 N at the maximum operating pressure of 0.9 MPa. Its 32 mm diameter piston rod extends from both ends, making it ideal for applications requiring a rear rod connection for mounting a sensor flag, stopper, or secondary tooling while maintaining a compact 75 mm stroke.
This ISO 6430 class tie-rod cylinder features an adjustable air cushion of 28 mm at each end to decelerate the piston smoothly. The body length A(SCD) is 291 mm, and the G1/2 ports are threaded PT. With a maximum standard stroke of 1500 mm for this bore, this 75 mm unit is a standard, off-the-shelf configuration, ready for integration into symmetric actuation setups.
| Model | Airtac SCD Standard Cylinder SCD125X75 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 75 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. |
| ×75 | 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 force and speed in both directions, combined with a rear rod for a counterbalance or sensor flag, makes this cylinder a perfect fit for smooth, controlled shuttle movements on linear transfer lines.
With 10321 N of force at 0.9 MPa available on both ends, the through rod can actuate a lower tool while the main rod drives an upper tool, synchronizing a two-sided pressing or staking operation from a single cylinder.
The dual-rod support naturally resists rotation of the piston, making the SCD125X75 an effective choice for pushing or ejecting parts where maintaining the tooling's angular orientation without an external guide is critical.
Select the SCD125X75 when you need balanced bidirectional force and a through rod for dual-sided tasks. If your load requires less force, stepping down to the SCD100 bore reduces output to 3681 N at 0.5 MPa. For applications needing only a single working end, the single-rod SC125 series is a more economical choice. This double-rod design provides enhanced guidance and anti-rotation compared to a single-rod cylinder, but it is not a substitute for a fully guided unit under significant side loads.
To replace an existing SCD125X75, match the 125 mm bore, 75 mm stroke, PT port thread, and basic mounting style. If your current cylinder uses a magnet for sensors, ensure the replacement model includes the -S suffix. For any stroke length, ensure the dual rod ends are not subjected to misaligned loads that could cause premature bushing wear.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is the same on both sides. At 0.5 MPa, the force is 5734 N; at 0.7 MPa, it is 8028 N; and at the maximum operating pressure of 0.9 MPa, it reaches 10321 N.
Choose the SCD when you need a rear rod connection for mounting external sensors, cams, or a secondary tool. The through rod also provides better support and inherent anti-rotation for the piston rod compared to a single-rod cylinder, and it guarantees perfectly equal speed and force for the extend and retract strokes.
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