Airtac SAID40 Double Rod Cylinder SAID40X70S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X70S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X70S
The AirTAC SAID40X70-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 70mm stroke. Because a carbon steel rod exits both end covers, the effective annulus area is identical on extend and retract. This yields exactly 528 N of output force in both directions at 0.5 MPa, ensuring perfectly symmetric speed and thrust for demanding transfer tasks.
Equipped with a magnet (-S), the extruded aluminum barrel integrates sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic solid-state switches. The rear rod protrusion is highly useful for mounting a secondary cam, position flag, or driving a second mechanism, while the PT tapered porting ensures a robust, leak-free pneumatic connection.
Airtac SAID40 Double Rod Cylinder SAID40X70S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X70S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAID40X70S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SAID40X70S Is Used
Symmetric Force Transfer
Ideal for parts handling where the 528 N both-way thrust ensures perfectly balanced acceleration and deceleration across the 70mm stroke.
Twin-Station Actuation
Drive two separate tooling stations simultaneously by mounting a workpiece on the front rod end and a secondary mechanism on the rear.
Anti-Rotation Slides
The dual-rod guidance prevents piston twisting, making it perfect for vertical lifting slides and precision-guided clamping jaws.
Is the Airtac SAID40 Double Rod Cylinder SAID40X70S the Right Cylinder?
Select this 40mm bore model when your application requires identical push and pull forces alongside superior anti-rotation resistance that a single-rod SAI cannot provide. If your mechanism needs slightly less thrust, stepping down to the 32mm bore yields 345 N both ways at 0.5 MPa. Conversely, upgrading to the 50mm bore provides 825 N in both directions.
Remember that a standard SAID does not hold its load or position when air pressure is removed or the valve is centered; the piston will drift. If your setup requires dead-stop holding without live pressure, consider an external rod lock, a SAIL pneumatic lock, or a BSAID clamp-lock variant. This unit is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders.
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 SAID40X70S FAQ
Because the double-rod design creates equal annulus areas on both sides of the piston, it generates 528 N of force in both extend and retract directions at 0.5 MPa, and 739 N at 0.7 MPa.
Yes, the SAID40X70-S is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 double-rod cylinders. It uses PT ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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