Airtac SAID40 Double Rod Cylinder SAID40X290S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X290S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X290S
The AirTAC SAID40X290-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a through-rod that exits both end covers. Because the rod occupies an equal area on both sides of the piston, the extend and retract forces are identical, yielding 528 N of thrust each way at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) enables solid-state DMSE or reed CMSE switch detection.
A defining benefit of the twin-rod layout is the ability to mount a primary workpiece on the front rod end and a secondary cam, position flag, or guide on the rear rod end simultaneously. This configuration provides superior anti-rotation stability compared to a single-rod SAI, while the carbon steel rod and M12x1.25 thread offer robust load anchoring for demanding industrial tasks.
Airtac SAID40 Double Rod Cylinder SAID40X290S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X290S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 290 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 SAID40X290S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×290 | 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 SAID40X290S Is Used
Symmetric Force Transfer
Ideal for mechanisms requiring identical push and pull dynamics, as the double-rod design ensures the 528N output remains perfectly balanced in both directions.
Rear-Rod Position Sensing
The integrated magnet and rear protruding rod allow DMSE or CMSE switches to track stroke end-points from the back of the machine while the front rod drives the load.
Anti-Rotation Slides
Twin rods exiting both ends provide enhanced lateral guidance and resist torsional twisting, making it suitable for precision sliding fixtures.
Is the Airtac SAID40 Double Rod Cylinder SAID40X290S the Right Cylinder?
Choose this 40mm bore cylinder when an application requires balanced push and pull forces alongside dual-side actuation or rear-rod sensing. If your mechanism needs slightly less thrust, the 32mm bore provides 345 N both ways at 0.5 MPa; if more power is required, stepping up to the 50mm bore yields 825 N in each direction. The standard 290mm stroke operates well within the 1200mm maximum limit, running at speeds of 30-800 mm/s.
Since the stroke is 290mm, the extended rod length increases the risk of side-load bending; utilizing an external guide is recommended to prevent premature rod-bearing wear. This model uses a PT tapered G1/4 port and supports the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR accessories found on single-rod variants. Note that the adjustable air cushions only decelerate the piston near stroke end; this cylinder will drift if air pressure is lost, so a SAIL or BSAID lock variant is needed for position holding.
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 SAID40X290S FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the push and pull forces are equal. It generates 528 N in both directions at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X290-S is dimensionally interchangeable per ISO 15552 profile cylinder standards. It serves as a drop-in replacement for other ISO 15552 double-rod cylinders, utilizing a G1/4 PT port and standard mounting interfaces.
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