The AirTAC Airtac SCD Standard Cylinder SCD80X300 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. Ø80mm bore, 300mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X300 is an 80 mm bore double-acting pneumatic cylinder engineered with a through-rod design, meaning the 25 mm diameter piston rod extends from both ends. This configuration guarantees absolutely identical force and speed in both directions of travel, delivering a balanced 2268 N of thrust in either direction when supplied with 0.5 MPa air pressure. With a 300 mm stroke, it is well-suited for mid-range transfer tasks where a rear rod extension can be used to mount a sensor flag, a mechanical stop, or secondary tooling.
Built on AirTAC's durable tie-rod platform, this cylinder includes an adjustable pneumatic cushion at both ends with a 28 mm cushion length to decelerate the piston smoothly, reducing end-of-stroke impact. The body length A is 257 mm, and the overall retracted length is longer than a comparable single-rod SC cylinder due to the rod protruding from the rear cap. It operates on filtered air from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa, and uses PT3/8 ports as standard.
| Model | Airtac SCD Standard Cylinder SCD80X300 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 300 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| 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, 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 in both directions makes the SCD80X300 perfect for shuttle tables that move a fixture between two stations, providing consistent acceleration and deceleration regardless of travel direction.
The rear rod extension provides an ideal mounting point for a sensor flag or cam, allowing end-of-stroke detection without interfering with the primary tooling mounted on the front rod.
Use the front rod for a pressing operation while the rear rod actuates a synchronized ejector or stripper plate, ensuring perfectly timed mechanical sequences from a single cylinder.
Select the SCD80X300 when your application requires identical push and pull force output and you can utilize the rear rod for a secondary function. If your load demands more thrust, stepping up to the SCD100 bore provides 3681 N at the same 0.5 MPa pressure. Conversely, if 2268 N exceeds your requirement and you need a lighter, more compact unit, the SCD63 bore offers 1402 N. This double-rod model is ideal for symmetric loading, but for applications with significant side loads, a guided cylinder or external linear guide should be used instead of relying solely on the dual-rod bearing support.
For a stroke of 300 mm, always assess the potential for rod bending under compressive load, especially if the rear rod is unsupported. If the application involves pushing a heavy mass with the front rod while the rear rod is free, consider adding an external guide rail to prevent buckling. This model is a direct replacement for another AirTAC SCD80X300 with matching PT ports and basic mounting; to upgrade, ensure the replacement matches bore, stroke, port thread, and mounting accessory.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it delivers 3175 N, and at the maximum operating pressure of 0.9 MPa the force is 4082 N. The theoretical force at 1.0 MPa is 463 kgf.
Choose the SCD when you need perfectly equal speed and force in both directions, or when you require a rear rod extension to mount sensors, stops, or secondary tooling. The through-rod design also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a substitute for a fully guided actuator under heavy side loads.
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