Airtac SCD Standard Cylinder SCD80X900S
The AirTAC Airtac SCD Standard Cylinder SCD80X900S 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, 900mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke900 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X900S
The SCD80X900S is a double-acting, double-rod pneumatic cylinder that outputs an identical 2268 N of force in both the extend and retract strokes when supplied with 0.5 MPa air. Because the 25 mm rod passes through both end caps, the effective piston area is the same on each side, giving machinery designers a perfectly symmetrical thrust profile for balanced linear motion. At the full 0.9 MPa operating pressure, each direction produces 4082 N, and the 28 mm adjustable air cushion at both ends helps decelerate the payload smoothly across the long 900 mm travel.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the tie-rod barrel for non-contact end-of-stroke or mid-stroke position feedback. The 900 mm stroke is well within the 1500 mm maximum standard stroke for the 80 mm bore, so it is a standard catalog item. The PT3/8 ports and M20x1.5 rod threads are standard, and the body length A(SCD) is 257 mm, making the overall retracted length longer than an equivalent single-rod SC cylinder due to the rod protruding from the rear cap.
Airtac SCD Standard Cylinder SCD80X900S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X900S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 900 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 SCD80X900S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SCD80X900S Is Used
Two-Sided Transfer Shuttles
The 900 mm stroke and equal 4082 N force at 0.9 MPa in both directions make this cylinder ideal for long-travel transfer shuttles that pick and place from either end. The rear rod can carry a counterbalance or a second tooling plate.
Rear-Mounted Stroke Sensing
With the built-in magnet, CMSG or DMSG sensors can be mounted on the rear end of the barrel to detect the piston's position via the rear rod's motion. This is useful when the front end is enclosed or inaccessible.
Symmetric Clamping & Pressing
The double-rod design provides better guidance than a single-rod cylinder, making it suitable for light pressing or clamping operations where the rod must not rotate and the force must be identical in both the clamp and release strokes.
Is the Airtac SCD Standard Cylinder SCD80X900S the Right Cylinder?
Choose the SCD80 when you need equal push-pull force in the 2268 N range at 0.5 MPa. If your load requires less force, stepping down to the 63 mm bore provides 1402 N each way, while moving up to the 100 mm bore delivers 3681 N. This double-rod design is the right pick when you need to mount tooling, a stopper, or a sensor flag on the rear rod, or when the application demands symmetric speed and force in both directions. If you only need force from one end, the single-rod SC80 is a simpler, more compact alternative.
At a 900 mm stroke, the unsupported rod length on both ends can be significant. For applications with any side load or off-centre mass, do not rely on the through-rod alone for guidance—add an external linear guide or switch to a guided cylinder to prevent rod bending and premature bearing wear. For direct replacement, match the 80 mm bore, 900 mm stroke, PT3/8 port thread, basic mounting, and the -S magnet option to ensure identical fit and sensor compatibility with an existing AirTAC SCD installation.
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 SCD80X900S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it produces 3175 N, and at the maximum operating pressure of 0.9 MPa it produces 4082 N in both directions.
Choose the SCD when you need to attach tooling or sensors to both ends of the rod, require perfectly equal speed and force in both directions, or need the improved bearing support and anti-rotation that a through-rod provides. If you only need force from one end and a more compact envelope, the single-rod SC series is a better fit.
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