Airtac SAID40 Double Rod Cylinder SAID40AX325S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX325S 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 SAID40AX325S
The AirTAC SAID40X325-S is a double-acting, double-rod ISO 15552 profile cylinder. A single piston drives a rod out of both end covers, meaning the annulus area is identical on extend and retract. Consequently, push and pull forces are perfectly equal, yielding 528 N in both directions at 0.5 MPa and 739 N at 0.7 MPa. The -S suffix indicates an embedded magnet for position sensing.
This 40mm bore variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, PT tapered port threads, and a 16mm rod diameter. The extruded aluminum barrel includes sensor grooves on both sides, accepting CMSE reed and DMSE electronic solid-state switches. Because the rear rod protrudes past the back cover, you must account for additional clearance behind the cylinder.
Airtac SAID40 Double Rod Cylinder SAID40AX325S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX325S |
|---|---|
| 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 SAID40AX325S
| 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 SAID40AX325S Is Used
Symmetric Force Transfer
Push and pull operations requiring identical 528N force and velocity, such as alternating clamping arms that must exert the exact same pressure in both directions.
Anti-Rotation Slides
Guiding vertical lifting stages where the twin rods prevent the load from twisting, maintaining strict parallelism without needing an external linear guide.
Rear-Mounted Position Flag
Driving a primary workpiece on the front rod while using the extended rear rod to push a mechanical cam or trigger CMSE/DMSE sensors from the opposite side.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX325S the Right Cylinder?
Choose this double-rod configuration when an application demands equal force and speed in both directions, or requires a secondary actuation point and anti-rotation guidance that a single-rod SAI cannot provide. If you need higher force, stepping up to the 50mm bore yields 825 N both ways at 0.5 MPa; dropping down to the 32mm bore provides 345 N. The SAID mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on single-rod variants.
At 325mm stroke, the unsupported piston rod is highly susceptible to bending under side loads. Do not rely on the rod bearing alone to support off-center loads; always use an external guide rail to prevent premature seal wear. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold a load. If the machine loses air pressure, the cylinder will drift, requiring an external rod lock or a SAIL/BSAID locking cylinder 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 SAID40AX325S FAQ
Because the double-rod design subtracts the rod area on both sides, the extend and retract forces are equal. It generates 528 N both ways at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, it is dimensionally interchangeable per ISO 15552. However, the SAID series only supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting styles. It does not use the FB, CA, CB, or CR brackets found on single-rod SAI cylinders.
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