The AirTAC Airtac SCD Standard Cylinder SCD100X270 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø100mm bore, 270mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD100X270 is a double-acting pneumatic cylinder engineered with a through-rod design, meaning the 25 mm piston rod extends from both end caps. This configuration subtracts the rod area from both sides of the piston, yielding an identical effective pressure area in each direction. At a standard 0.5 MPa air supply, the cylinder produces a balanced 3681 N of force for both push and pull strokes, making it ideal for applications where symmetric thrust and speed are non-negotiable.
With a 100 mm bore and a 270 mm stroke, this model is well within the 1500 mm maximum standard stroke for this bore size. The cylinder body has a retracted length (A dimension) of 263 mm, and the adjustable pneumatic cushion at each end is 29 mm long, providing smooth deceleration. The tie-rod construction ensures robust, serviceable performance, and the PT1/2 port threads offer standard pneumatic connectivity.
| Model | Airtac SCD Standard Cylinder SCD100X270 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 270 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 29 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 | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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). |
|---|---|
| 100 | Bore size in mm. |
| ×270 | 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 3681 N at 0.5 MPa ensures a transfer shuttle moves with identical speed and power in both directions, preventing product shifting during rapid directional changes on a linear transfer line.
With a rod guided by bearings in both end caps, the SCD100X270 provides inherent anti-rotation stability. This makes it suitable for pushing components off a conveyor without the pusher plate twisting, maintaining alignment over the 270 mm stroke.
The rear rod extension can be used to mount a secondary tool, a confirmation sensor flag, or an adjustable hard stop. This allows one cylinder to perform a primary push action while the rear rod triggers a limit switch or operates a light-duty linkage.
Select the SCD100X270 when your mechanism requires equal force output in both directions from a single actuator, such as a shuttle table or a dual-sided clamping fixture. If your load demands less force, the next bore down is the SCD80, which provides 2268 N at 0.5 MPa. Conversely, if you need significantly more thrust, the SCD125 steps up to 5734 N at the same pressure. Always ensure the 270 mm stroke does not subject the extended rod to excessive side load; for applications with high radial forces, an external guide rail or a dedicated guided cylinder is a safer choice than relying solely on the double-rod bearings.
This cylinder is a direct replacement for another AirTAC SCD100 double-rod unit matching the 100 mm bore, 270 mm stroke, PT port thread, and basic mounting style. If you are upgrading from a single-rod SC series cylinder, be aware that the SCD's overall length is greater due to the rear rod extension, and the force output is lower than the SC's push stroke because the rod area is deducted on both sides.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The force is 3681 N at 0.5 MPa, 5153 N at 0.7 MPa, and reaches 6626 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 751 kgf.
Choose the SCD when you need perfectly balanced speed and force for both extend and retract strokes, or when you need a rear rod end to mount sensors, stops, or secondary tooling. The dual-end bearing support also offers better guidance than a single-rod cylinder, though it is not a substitute for an external guide under heavy side loads.
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