Airtac SAID40 Double Rod Cylinder SAID40X325S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X325S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X325S
The AirTAC SAID40X325-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 325mm stroke. Because the piston rod extends through both end covers, the annulus area is identical on the extend and retract sides. This means you get exactly 528N of output force in both directions at 0.5 MPa, ensuring perfectly balanced push and pull kinematics.
Fitted with a standard magnet (-S), this variant is fully compatible with AirTAC CMSE reed and DMSE electronic sensors that seat directly into the extruded aluminum barrel grooves on both sides. The rear rod extension is highly useful for mounting a secondary cam, a position flag, or driving a second mechanism, while providing superior anti-rotation guidance compared to a single-rod SAI.
Airtac SAID40 Double Rod Cylinder SAID40X325S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X325S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 325 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 SAID40X325S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×325 | 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 SAID40X325S Is Used
Symmetric Force Transfer
Ideal for machinery requiring identical push and pull forces, utilizing the twin-rod design to maintain 528N of consistent thrust in both directions at 0.5 MPa.
Through-Rod Sensing
The rear rod extension allows engineers to mount a secondary position flag or cam, triggering external sensors while the front rod performs the primary work.
Anti-Rotation Slides
Provides superior resistance to torsional deflection compared to single-rod actuators, keeping guided loads perfectly stable across the 325mm travel.
Is the Airtac SAID40 Double Rod Cylinder SAID40X325S the Right Cylinder?
Choose this 40mm bore cylinder when an application demands equal push and pull forces alongside dual-side guidance. If your mechanism requires less force, stepping down to the 32mm bore yields 345N both ways; if you need more power, the 50mm bore provides 825N at 0.5 MPa. This SAID40X325-S configuration uses PT tapered ports (G1/4) and includes the -S magnet for position sensing.
With a 325mm stroke, the unsupported load can generate significant bending moments on the rod bearings during side-loaded applications. For optimal longevity, incorporate an external linear guide to carry the load and prevent premature wear. Note that this cylinder relies on adjustable air cushions to decelerate the piston at stroke ends and does not hold position if air pressure is lost; for fail-safe locking, consider the BSAID clamp-lock series. Mounting options are limited to the SAID set: Basic, FA, LB, TC, FTC, TCM1, and 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 SAID40X325S FAQ
Because the double-rod design occupies area on both sides of the piston, the effective annulus area is identical in both directions. The output force is 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X325-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 the standard mounting interface and PT G1/4 ports.
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