Airtac SAI125 Standard Air Cylinder SAI125X500S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X500S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X500S
The AirTAC SAI125X500-S is a double-acting ISO 15552 profile cylinder offering a robust 6136 N push force at 0.5 MPa. Its 500 mm stroke handles extended travel requirements while maintaining a standardized mounting interface for straightforward machinery integration.
Equipped with a magnetic piston (-S), this unit supports CMSE and DMSE position sensing along the dual sensor grooves machined into the extruded aluminum barrel. The standard carbon steel rod provides dependable service in demanding industrial environments.
Airtac SAI125 Standard Air Cylinder SAI125X500S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X500S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAI125X500S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAI125X500S Is Used
Automated Press Systems
Provides the high thrust necessary for stamping, clamping, and light pressing operations on automated production lines.
Material Handling Diverters
Actuates large-scale diverter arms and sorting gates over extended 500 mm travel distances in heavy parcel distribution hubs.
Heavy Fixture Positioning
Shifts substantial welding or machining fixtures into the working zone, taking advantage of the standardized ISO 15552 mounting dimensions.
Is the Airtac SAI125 Standard Air Cylinder SAI125X500S the Right Cylinder?
Choose this 125 mm bore when 8590 N of push force at 0.7 MPa is required, stepping up from the 80 mm bore that yields 3518 N at the same pressure. For applications needing less thrust, consider the 100 mm bore which provides 5497 N at 0.7 MPa. The PT tapered port threads ensure a secure, leak-free pneumatic connection.
Because this model features a 500 mm stroke, unsupported rod length introduces a risk of bending under side loads. Utilizing an external guide rail or a fully guided cylinder module is strongly recommended to protect the rod bearing and ensure smooth actuation. If the machinery requires absolute load holding upon air pressure loss, the standard SAI will drift; select the SAIL variant with an air-released lock or an external pilot-operated check valve instead.
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 SAI125X500S FAQ
This cylinder provides a theoretical push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa. The pull force at 0.5 MPa is 5734 N.
Yes, the SAI125X500-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with matching mounting accessories, provided your application respects the 30-500 mm/s speed range.
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