Airtac SAID40 Double Rod Cylinder SAID40X270S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X270S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 270mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke270 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X270S
The AirTAC SAID40X270-S is a double-acting, double-rod ISO 15552 profile cylinder. Because a rod extends from both end covers, the annulus area is identical on each side, yielding an equal extend and retract force of 528 N at 0.5 MPa. This through-rod geometry provides superior anti-rotation stability compared to a single-rod SAI.
Equipped with a magnetic piston (-S), it supports AirTAC CMSE reed and DMSE electronic sensors housed within the dual side grooves of the extruded aluminum barrel. The standard carbon steel rod and PT tapered port threads ensure robust daily operation, while the rear rod end can simultaneously drive a secondary mechanism or position flag.
Airtac SAID40 Double Rod Cylinder SAID40X270S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X270S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40X270S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×270 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID40 Double Rod Cylinder SAID40X270S Is Used
Symmetric Transfer
Drives a shuttle mechanism where identical push and pull forces are required to move components evenly without speed fluctuations between strokes.
Anti-Rotation Slides
The twin-rod architecture prevents the attached tooling plate from twisting under offset loads, maintaining precise linear guidance for handling tasks.
Dual-Station Actuation
The front rod end handles the primary workpiece while the protruding rear rod end directly operates a secondary valve or limit flag simultaneously.
Is the Airtac SAID40 Double Rod Cylinder SAID40X270S the Right Cylinder?
Select this 40mm bore when an application demands 528 N of symmetric thrust in both directions, stepping up from a 32mm bore (345 N) if extra power is needed, or down from a 50mm bore (825 N) to save space. The twin-rod design is chosen over a single-rod cylinder to prevent load twisting during transit. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load if air pressure drops. For position holding without live pressure, an external pilot-operated check valve or a BSAID clamp-lock is required.
With a 270mm stroke, the unsupported rod length increases bending susceptibility under side loads. Utilizing an external guide rail is highly recommended to protect the rod bearing. As a dimensionally interchangeable ISO 15552 unit, it drops in seamlessly with matching mounting accessories (Basic, FA, LB, TC, FTC, TCM1, TCM2) and PT G1/4 ports.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID40 Double Rod Cylinder SAID40X270S FAQ
Because it is a double-rod cylinder, the effective piston area is identical on both sides. It provides an equal force of 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa in both the extend and retract directions.
Yes, the SAID40X270-S is dimensionally interchangeable per ISO 15552 profile standards. It shares the exact same mounting interface and footprint, allowing it to serve as a drop-in replacement for other ISO 15552 double-rod cylinders.
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