The AirTAC Airtac SCD Standard Cylinder SCD80X250STC 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, 250mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X250STC is a double-acting, double-rod pneumatic cylinder delivering identical push and pull force of 2268 N at 0.5 MPa (4082 N at the maximum operating pressure of 0.9 MPa). Its 25 mm diameter rod passes through both end caps, providing a rear extension that is ideal for mounting a sensor flag, a mechanical stop, or secondary tooling, all while ensuring perfectly symmetric thrust and speed in each direction.
This model is factory-configured with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion mount (TC) that allows the cylinder body to pivot, accommodating swinging loads. The tie-rod construction uses a PT3/8 port and has an adjustable air cushion length of 28 mm to decelerate the piston smoothly at both ends of its 250 mm stroke.
| Model | Airtac SCD Standard Cylinder SCD80X250STC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 250 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. |
| ×250 | 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 through-rod design allows a single cylinder to power a shuttle table, with tooling mounted on both ends to transfer parts between two parallel conveyor lines simultaneously.
The protruding rear rod provides a perfect attachment point for a sensor flag or cam, enabling end-of-stroke detection with external limit switches when the cylinder body is obscured.
Delivers equal force from both rod ends, making it suitable for a dual-sided clamping or pressing fixture where a workpiece is engaged from opposite sides with identical pressure.
Select the SCD80 bore when your application needs roughly 2268 N of balanced force in both directions at standard plant air pressure. If you require a more compact unit with lower thrust, the SCD63 bore provides 1402 N at 0.5 MPa; for heavier tooling, stepping up to the SCD100 delivers 3681 N. This double-rod design is the correct choice when you need to attach components to both ends of the piston rod, but for applications with significant side loading, an external guide rail or a dedicated guided cylinder is necessary to protect the rod bearings.
This SCD80X250STC is a direct replacement for an existing AirTAC unit with the same 80 mm bore, 250 mm stroke, PT3/8 ports, centre trunnion (TC) mounting, and built-in magnet. The 250 mm stroke is well within the 1500 mm maximum for this bore, ensuring standard availability. The trunnion bracket (F-SC80TC) is included, allowing the cylinder to pivot freely in its mounting plane.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The force is 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and reaches 4082 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod, or when you require perfectly equal speed and force in both directions. The through-rod also provides better guidance and anti-rotation support for the piston than a single-rod design.
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