The AirTAC Airtac SCD Standard Cylinder SCD40X80 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 80mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X80 is a double-acting, double-rod pneumatic cylinder that outputs exactly 528 N in both directions at 0.5 MPa, thanks to its symmetrical piston area. With an 80 mm stroke and a 16 mm diameter rod protruding from both end caps, it gives you identical push and pull force, making actuator sizing simpler for two-sided tooling.
This 40 mm bore model uses PT1/4 ports and has an adjustable air cushion of 21 mm at each end to decelerate the load smoothly. The retracted body length A(SCD) is 191 mm, and the through-rod provides better bearing support than a single-rod cylinder of the same size, helping to resist minor side loads.
| Model | Airtac SCD Standard Cylinder SCD40X80 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 80 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 16 mm rod on both ends allows a single cylinder to push a shuttle table forward and pull it back with equal 528 N force, simplifying pneumatic circuit design.
Mount a sensor flag or cam on the rear rod extension to detect end-of-stroke position without interfering with the front tooling, keeping the main work area clear.
The dual-rod bearing arrangement resists rod rotation better than a single-rod cylinder, making it suitable for simple push applications where you need to prevent the tool from twisting.
Choose the SCD40X80 when your application needs a rear rod end for mounting a sensor flag, a stopper bolt, or secondary tooling, and you want equal speed and force in both directions. If 528 N is too light, stepping up to the 50 mm bore SCD50 delivers 825 N at the same 0.5 MPa pressure. If you only need force from one end, the single-rod SC series is a more compact and cost-effective alternative.
For replacement, match the bore (40 mm), stroke (80 mm), PT port thread, and SCD-specific mounting accessory. This basic model ships without brackets or a magnet; if you need position sensing, order the SCD40X80-S variant with a built-in magnet for CMSG/DMSG sensors.
Double-rod checklist
Push and pull force are identical because the piston rod extends through both ends. At 0.5 MPa it produces 528 N, at 0.7 MPa it's 739 N, and at the maximum operating pressure of 0.9 MPa it reaches 950 N in both directions.
Pick the SCD when you need to attach tooling or sensors to both ends of the rod, require perfectly equal force and speed in both directions, or want the improved guidance and anti-rotation that a through-rod provides. If you only need force at one rod end, the SC series is the right choice.
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