The AirTAC Airtac SCD Standard Cylinder SCD125X200 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, 200mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD125X200 is a double-acting, double-rod pneumatic cylinder providing perfectly balanced bidirectional force, with both the push and pull stroke delivering 5734 N at 0.5 MPa. This symmetry comes from the 32 mm rod passing through both end caps, eliminating the force differential found in single-rod cylinders and making it ideal for applications requiring identical speed and thrust in each direction.
With a 200 mm stroke, this ISO 6430 class cylinder features a 28 mm adjustable air cushion on each end to decelerate the piston smoothly. The tie-rod construction and G1/2 ports support a maximum operating pressure of 1.0 MPa, where the equal force output rises to 10321 N. The body length A(SCD) is 291 mm, providing a compact footprint for its force class.
| Model | Airtac SCD Standard Cylinder SCD125X200 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 200 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. |
| ×200 | 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 this cylinder perfect for shuttles that move a pallet or workpiece back and forth with identical speed and thrust, eliminating the need for flow controls to balance asymmetric forces.
Mount a press tool on the front rod and a stripper plate or second tool on the rear rod. The through-rod design ensures both tools actuate with the same 10321 N of force at 0.9 MPa, simplifying the mechanical design.
The protruding rear rod provides a convenient, protected location to mount a sensor flag or a cam for external limit switches, keeping the sensing mechanism clear of the main tooling on the front of the cylinder.
Select this SCD125X200 when your application demands equal force and speed in both directions, such as a transfer shuttle or a press with tooling on both rod ends. If your load requires more force, the SCD160X200 steps up to 9425 N at 0.5 MPa. For a single-rod solution with a higher push force, consider the SC125X200, but note you will lose the rear rod for mounting sensors or a stop. When replacing an existing double-rod cylinder, match the 125 mm bore, 200 mm stroke, PT port thread, and the specific SCD mounting accessory (Basic, FA, LB, or TC). A magnet can be added by ordering the -S suffix for sensor compatibility.
Double-rod checklist
The push and pull force are identical because it is a double-rod cylinder. At 0.5 MPa, both directions produce 5734 N. The force rises to 8028 N at 0.7 MPa and reaches 10321 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD125X200 when you need equal force and speed in both directions, or when you need a second rod end to mount tooling, a mechanical stop, or a sensor flag. A single-rod SC cylinder will have a higher push force due to the full piston area, but its pull force is lower and it lacks the rear rod extension.
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