Airtac SAI125 Standard Air Cylinder SAI125X325
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X325 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 SAI125X325
The AirTAC SAI125X325 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore actuator is built to handle substantial loads across its 325 mm stroke. The extruded aluminum barrel design omits tie-rods, providing a smooth exterior that resists contamination and simplifies cleaning.
This specific configuration features a standard carbon steel piston rod and PT tapered port threads. Because no magnet is specified, it ships without sensor tracks; if position feedback is required later, an -S variant with dual-side sensor grooves for CMSE or DMSE switches would be necessary.
Airtac SAI125 Standard Air Cylinder SAI125X325 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X325 |
|---|---|
| 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 SAI125X325
| 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 SAI125X325 Is Used
Heavy Metal Stamping
Provides the robust 6136 N thrust at 0.5 MPa required for securely clamping large metal sheets during heavy stamping operations.
Automotive Assembly Presses
Drives large robotic welding fixtures and heavy structural positioning blocks in automotive body-in-white production lines.
Pallet Handling Diverters
Actuates heavy-duty diverter arms and lifting stations on high-capacity pallet conveyor systems handling industrial loads.
Is the Airtac SAI125 Standard Air Cylinder SAI125X325 the Right Cylinder?
Selecting this 125 mm bore actuator makes sense when the 100 mm class (offering 3927 N push at 0.5 MPa) is insufficient for your load demands. Conversely, stepping up to a 160 mm bore yields 10053 N if your application requires even greater thrust margins.
With a 325 mm stroke, the extended carbon steel rod is highly susceptible to bending under side loads. To prevent premature rod-bearing wear and seal failure, mount external guide rails or employ a fully guided cylinder to absorb lateral forces. Furthermore, this standard SAI model relies on live air pressure to maintain position; it will drift if air is exhausted. For fail-safe load holding without pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard 125 mm bore, 325 mm stroke unit with G1/2 ports and compatible FA, LB, or TC mountings.
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 SAI125X325 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, the theoretical force reaches 1251 kgf.
Yes, the SAI125X325 is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions, G1/2 port, and 325 mm stroke make it dimensionally interchangeable with other ISO 15552 profile cylinders of the same bore size.
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