Airtac SCD Standard Cylinder SCD80X550S
The AirTAC Airtac SCD Standard Cylinder SCD80X550S 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, 550mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke550 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X550S
The SCD80X550S is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, delivering perfectly balanced force and speed in each direction. At 0.5 MPa, it provides 2268 N of thrust both extending and retracting, a defining advantage for symmetrical motion tasks. The 25 mm diameter through-rod improves bearing support and resists rotation better than a single-rod design.
This 550 mm stroke model includes a built-in magnet (denoted by the -S suffix), allowing easy attachment of CMSG, DMSG, or EMSG reed and solid-state sensors directly to the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. With a body length A(SCD) of 257 mm and an adjustable air cushion of 28 mm at each end, it decelerates the piston smoothly, making it suitable for moving tooling or stops on both sides of the machine.
Airtac SCD Standard Cylinder SCD80X550S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X550S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 550 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 SCD80X550S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×550 | 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 SCD80X550S Is Used
Bidirectional Shuttle Tables
The equal 2268 N push/pull force and through-rod design make this cylinder ideal for transfer shuttles that carry a load in both directions, ensuring consistent acceleration and deceleration regardless of travel direction.
Dual-Side Sensing & Actuation
With the integrated -S magnet, mount sensors on the barrel to confirm position, while the rear rod extension can trigger a separate limit switch or carry a secondary tool, flag, or counterbalance weight.
Non-Rotating Pusher Stations
The dual-rod bearing support provides inherent anti-rotation, making the SCD80X550S a strong choice for pushing components into a fixture where rod twist must be minimized without adding an external guide.
Is the Airtac SCD Standard Cylinder SCD80X550S the Right Cylinder?
Choose the SCD80 when you need balanced bidirectional force around the 2268 N mark at 0.5 MPa. If your application requires more thrust, the SCD100 delivers 3681 N under the same pressure, while stepping down to the SCD63 provides 1402 N. For any stroke length of 300 mm or more, like this 550 mm unit, evaluate the side load on the extended rod; the double-rod design offers better guidance than a single-rod SC, but heavy off-axis loads still demand an external guide rail or a dedicated guided cylinder.
This cylinder is a direct replacement for another AirTAC SCD80 double-rod unit matching the 80 mm bore, 550 mm stroke, PT port thread, basic mounting, and the -S magnet option. If your task only requires force from one end, a single-rod SC80 cylinder may be a simpler and more cost-effective alternative.
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 SCD80X550S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 2268 N, at 0.7 MPa it's 3175 N, and at the maximum operating pressure of 0.9 MPa it reaches 4082 N in both directions.
Select the SCD80 when you need equal force and speed in both directions, want to mount a tool or sensor on the rear rod, or require the better bearing support and anti-rotation characteristics that a through-rod provides. If you only need force from one end, the single-rod SC80 is typically the better choice.
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