The AirTAC Airtac SCD Standard Cylinder SCD80X185S 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, 185mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X185S is an 80 mm bore double-rod pneumatic cylinder delivering perfectly symmetrical force in both directions—2268 N at 0.5 MPa, rising to 4082 N at the maximum operating pressure of 0.9 MPa. Because the 25 mm rod passes through both end caps, the effective piston area is identical on the push and pull strokes, making this actuator ideal for tasks where balanced speed and thrust are non-negotiable.
With a 185 mm stroke, this model stays well within the 1500 mm maximum standard stroke for the 80 bore. The built-in magnet, denoted by the 'S' suffix, allows easy attachment of CMSG, DMSG, or EMSG sensors directly to the tie-rod barrel for precise, non-contact end-of-stroke or mid-stroke position feedback. Its adjustable air cushion, with a 28 mm cushion length, decelerates the piston smoothly at both ends of the cycle.
| Model | Airtac SCD Standard Cylinder SCD80X185S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 185 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. |
| ×185 | 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 2268 N at 0.5 MPa and a rod on both ends allow a tooling plate to be mounted on each side, doubling throughput in a material transfer station.
The built-in magnet works with barrel-mounted sensors on either end. Use the rear rod extension to carry a sensor flag or cam, keeping the front work area clear and sensors protected.
With a 25 mm rod supported in both end caps, the assembly resists rotation better than a single-rod cylinder, making it suitable for simple push applications where a guided cylinder is overkill.
Choose the SCD80 bore when your application needs a balanced force around 2268 N at standard plant pressure. If you can accept slightly asymmetric forces and only need actuation from one end, the single-rod SC80 is a more compact and cost-effective alternative. For a step down in force, the SCD63 bore provides 1402 N at 0.5 MPa, while stepping up to the SCD100 gives a substantial jump to 3681 N.
This is a genuine AirTAC SCD double-rod cylinder with a basic mount and PT ports. For a drop-in replacement, match the 80 mm bore, 185 mm stroke, PT port thread, and the integrated magnet. Since the stroke is long, ensure the dual-rod design is not subjected to high side loads; for guided linear motion, consider pairing it with an external guide rail or selecting a dedicated guided cylinder instead.
Double-rod checklist
The push and pull forces are identical because the rod passes through both ends. At 0.5 MPa it outputs 2268 N, at 0.7 MPa it reaches 3175 N, and at the maximum operating pressure of 0.9 MPa it generates 4082 N.
Choose the SCD80 when you need perfectly balanced force and speed in both directions, or when you need to mount a tool, stopper, or sensor flag on the rear rod extension. The dual bearing support also provides better resistance to side loads than a single-rod cylinder, though it is not a full guided actuator.
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