Airtac SCD Standard Cylinder SCD80X400
The AirTAC Airtac SCD Standard Cylinder SCD80X400 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, 400mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke400 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X400
The SCD80X400 is a double-acting pneumatic cylinder with a continuous piston rod extending from both ends, delivering perfectly symmetrical force in both directions. At 0.5 MPa, it provides 2268 N of thrust whether extending or retracting, and at the maximum operating pressure of 0.9 MPa, that equal force rises to 4082 N, making it a predictable choice for dual-sided tooling.
This 80 mm bore model uses a 25 mm diameter rod and PT3/8 ports, with an adjustable air cushion of 28 mm at each end to decelerate the piston smoothly. The double-rod design inherently improves rod guidance and resists rotation better than a single-rod cylinder, while the rear rod extension can carry a sensor flag, a mechanical stop, or secondary tooling without needing a separate actuator.
Airtac SCD Standard Cylinder SCD80X400 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X400 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 400 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.
Theoretical Output Force (Ø80mm, double rod)
| 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.
Model Code: Airtac SCD Standard Cylinder SCD80X400
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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.
Where the Airtac SCD Standard Cylinder SCD80X400 Is Used
Dual-Sided Transfer Shuttle
The equal 2268 N force in both directions and the rod protruding from both ends make the SCD80X400 ideal for shuttling a workpiece between two stations. Mount a gripper on the front rod and a counterbalance or secondary tool on the rear rod for a compact, self-contained transfer axis.
Anti-Rotation Pusher
With a 25 mm through-rod supported by bearings in both end caps, this 400 mm stroke cylinder resists rod rotation far better than a single-rod design. Use it as a non-rotating pusher in a packaging line where the tooling must maintain a fixed orientation without an external guide rail.
Rear-Mounted Stroke Sensing
The rear rod extension provides a clean, accessible location to mount a sensor flag or a mechanical limit stop. Monitor the full 400 mm stroke from the back of the cylinder without interfering with the primary tooling on the front rod, simplifying machine layout and wiring.
Is the Airtac SCD Standard Cylinder SCD80X400 the Right Cylinder?
Select the SCD80X400 when you need identical push-pull force and the ability to mount tooling or sensors on both rod ends. If your application requires more force, step up to the SCD100 bore, which provides 3681 N at the same 0.5 MPa; if space is tight and 2268 N is more than enough, the SCD63 bore delivers 1402 N. For applications with significant side loads on the 400 mm stroke, consider adding an external linear guide or switching to a guided cylinder, as the through-rod provides better support than a single rod but is not a substitute for a dedicated moment-load bearing.
This cylinder is a direct replacement for an existing AirTAC SCD80X400 with the same PT port thread and basic mounting. To match a unit with a magnet, order SCD80X400-S; for a centre trunnion mount, specify SCD80X400-TC.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD80X400 FAQ
Because the SCD is a double-rod cylinder, the effective piston area is identical on both sides, so push and pull forces are equal. At 0.5 MPa, the force is 2268 N; at 0.7 MPa, it is 3175 N; and at the maximum operating pressure of 0.9 MPa, it reaches 4082 N. The theoretical force at 1.0 MPa is 463 kgf.
Choose the SCD80X400 when you need equal force and speed in both directions, or when you want to use the rear rod extension for mounting sensors, stops, or secondary tooling. The through-rod also provides better bearing support and inherent anti-rotation compared to a single-rod cylinder. If you only need to push from one end and a slight force difference between extend and retract is acceptable, the single-rod SC series is a more compact and cost-effective option.
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