Airtac SAI125 Standard Air Cylinder SAI125AX325S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX325S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX325S
The AirTAC SAI125X325-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 8590 N at 0.7 MPa, making it ideal for moving substantial masses. The 325 mm stroke is a non-standard, made-to-order length tailored for specialized machinery. A magnet is included for position detection.
This model features a SUS420J2 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE or DMSE switches. For operations requiring position holding without air pressure, consider the SAIL lock variant.
Airtac SAI125 Standard Air Cylinder SAI125AX325S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX325S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI125 Standard Air Cylinder SAI125AX325S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAI125 Standard Air Cylinder SAI125AX325S Is Used
Automotive Assembly
Drives heavy stamping presses and positions large vehicle body panels on the production line.
Plastic Injection
Actuates large molds and securely clamps heavy injection molding tooling.
Material Handling
Pushes heavy pallets and diverts large industrial packages at transfer stations.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX325S the Right Cylinder?
Select this 125 mm bore when 100 mm (5497 N push at 0.7 MPa) lacks the power to move heavy fixtures, but a 160 mm bore (14074 N) would be excessive. The PT tapered port threads ensure a reliable, leak-free connection in high-flow pneumatic circuits.
Because the 325 mm stroke exceeds standard lengths, it is classified as a non-standard stroke. At this length, side loads can cause rod-bearing bending; use an external guide rail or a guided cylinder to prevent premature wear. Note that the standard SAI does not hold loads when air pressure is lost—use the BSAI clamp-lock variant for fail-safe holding. It serves as a drop-in replacement for other ISO 15552 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 SAI125 Standard Air Cylinder SAI125AX325S FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N.
Yes, the SAI series is dimensionally interchangeable per ISO 15552. You can drop it into existing ISO 15552 mounting footprints without altering the machine frame.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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