Airtac SAID40 Double Rod Cylinder SAID40X900
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X900 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X900
The AirTAC SAID40X900 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 900mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on both sides, yielding exactly 528N of force in both extend and retract directions at 0.5MPa. This symmetric output is ideal for mechanisms requiring consistent dynamic performance.
The twin-rod architecture allows you to mount the primary workpiece on one end and attach a position flag, cam, or secondary drive on the rear rod. It uses a PT G1/4 port thread and includes adjustable air cushions at both ends to decelerate the piston near stroke end. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
Airtac SAID40 Double Rod Cylinder SAID40X900 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X900 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAID40X900
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAID40X900 Is Used
Symmetric Force Transfer
Drives a shuttle mechanism where the 528N both-way force at 0.5MPa ensures identical push and pull dynamics without pressure compensation.
Through-Rod Sensing
Operates a primary tool on the front rod while the rear rod end directly triggers an external limit flag for precise cycle tracking.
Anti-Rotation Slides
Guides a lifting platform using the twin rods to resist mechanical twist and maintain strict parallel alignment over the 900mm travel.
Is the Airtac SAID40 Double Rod Cylinder SAID40X900 the Right Cylinder?
Choose this 40mm bore double-rod cylinder when an application demands equal push and pull forces, or when a rear rod is needed to actuate a secondary mechanism. If your mechanism only requires a single pushing rod and standard unequal forces are acceptable, the single-rod SAI40X900 is a simpler alternative. If you need higher both-way force, stepping up to the 50mm bore yields 825N at 0.5MPa.
Because the 900mm stroke is long, the unsupported rod bearing is subjected to greater bending moments under side loads; use an external guide rail to prevent premature wear. Note that a plain SAID does not hold its position when air pressure is lost or the valve is centered—the piston will drift. For load-holding requirements without live pressure, consider the SAIL (air-released lock) or BSAID (clamp-lock) variants. This model is dimensionally interchangeable per ISO 15552 and uses the reduced SAID mounting set: Basic, FA, LB, TC, FTC, TCM1, TCM2.
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 SAID40X900 FAQ
The SAID40X900 double-rod cylinder generates 528N of force in both the extend and retract directions at 0.5MPa, and 739N at 0.7MPa. Because a rod occupies both sides of the piston, the effective area and resulting force are equal both ways.
Yes, it is dimensionally interchangeable with ISO 15552 profile cylinders. It supports a specific subset of mounts including Basic, FA, LB, TC, FTC, TCM1, and TCM2, but omits FB, CA, CB, and CR mounts which are reserved for single-rod configurations.
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