The AirTAC Airtac SCD Standard Cylinder SCD80X780TC 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, 780mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X780TC is a double-acting, double-rod pneumatic cylinder built around an 80 mm bore and a 780 mm stroke, delivering perfectly balanced motion because the 25 mm piston rod extends from both ends. This symmetry gives you an identical effective piston area on the push and pull sides, producing a consistent 2268 N of force in either direction when supplied with 0.5 MPa air pressure. The cylinder body has a retracted length reference A(SCD) of 257 mm, and the integrated adjustable air cushion (28 mm long) decelerates the piston smoothly at each end of travel.
This model is configured with the TC centre trunnion mount (supplied with the TCM1 bracket, order code F-SC80TC), allowing the cylinder to pivot as it strokes—ideal for swinging or articulating linkages. The standard PT (Rc) ports are sized at 3/8, and the default TPU seals provide reliable operation from -20 to +70 °C. Because the through-rod design guides the piston from both ends, it offers better resistance to deflection than a single-rod cylinder of the same stroke, though a long 780 mm reach with an unsupported load still demands an external guide for true side-load capability.
| Model | Airtac SCD Standard Cylinder SCD80X780TC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 780 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. |
| ×780 | 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 the SCD80X780TC makes it a natural fit for shuttle or transfer tables where a pallet or fixture must be moved back and forth with identical speed and thrust in both directions.
With a rod protruding from both ends, this cylinder can drive two separate mechanisms simultaneously—such as opening and closing a pair of gates or actuating tooling on opposite sides of the machine frame from a single central cylinder.
The through-rod design provides inherent anti-rotation and better bearing support, making it suitable for clamping or light forming operations where the rod must resist twisting and deliver force evenly to both sides of a workpiece.
Choose the SCD80 bore when your application needs roughly 2268 N of balanced force at 0.5 MPa. If your load is lighter and you can accept a smaller footprint, stepping down to the 63 mm bore (1402 N at 0.5 MPa) may save space and air consumption. For heavier tooling, the 100 mm bore delivers 3681 N. Remember that a double-rod cylinder is the right call when you need to mount tooling, a mechanical stop, or a sensor flag on the rear rod, or when you require equal speed and force in both directions. If you only need force from one end, the simpler single-rod SC series is a more economical choice.
At a 780 mm stroke, the long, unsupported rod can experience bending under side loads. If your application imposes any radial force, pair this cylinder with an external linear guide or consider a guided cylinder unit. For direct replacement, match an existing SCD80 double-rod cylinder with the same 780 mm stroke, PT port thread, and TC centre-trunnion mounting configuration.
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 reaches 4082 N in both directions.
You choose an SCD when you need a rod on both ends of the cylinder. This allows you to attach tooling or sensors to the rear rod, provides equal force and speed in both directions, and offers better guidance and anti-rotation than a single-rod design. If you only need force from one end, the SC single-rod series is typically more compact and cost-effective.
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