Airtac SAI125 Standard Air Cylinder SAI125AX900S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX900S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX900S
The AirTAC SAI125X900-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for moving substantial masses over its 900 mm stroke. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet allows seamless position detection using CMSE or DMSE switches.
This specific configuration utilizes an SUS420J2 stainless steel piston rod (material code A) for enhanced resistance to moisture and corrosion compared to standard carbon steel. The ports feature PT tapered threads, and the cylinder includes adjustable air cushions at both ends to decelerate the heavy 125 mm bore piston smoothly. Operating speed ranges from 30-500 mm/s, ensuring controlled actuation even under high inertia loads.
Airtac SAI125 Standard Air Cylinder SAI125AX900S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX900S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAI125AX900S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAI125AX900S Is Used
Heavy Stamping
Provides the high thrust necessary for pressing bearings or forming thick metal components in automated machining lines.
Pallet Diverting
Handles the lateral redirection of heavy-loaded pallets over long conveyor stretches using the 900 mm stroke.
Large Gate Actuation
Opens and closes substantial industrial safety gates or material flow valves where high pull force is required.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX900S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when 80 mm bore models provide insufficient thrust, stepping up significantly from the 2513 N push force of the SAI80 series at 0.5 MPa. Because this model features a 900 mm stroke, the extended piston rod is highly susceptible to bending under side loads. To prevent rod-bearing damage, implement an external guide rail or use a dedicated guided cylinder to absorb lateral forces.
As a true ISO 15552 profile cylinder, it offers a drop-in dimensional replacement for other ISO 15552 compliant units. For applications requiring the load to be held in place during a loss of air pressure, note that the standard adjustable air cushion only decelerates the piston at stroke end and does not act as a brake. In such scenarios, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder.
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 SAI125AX900S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. If higher pressure is available, it can deliver up to 8590 N push force at 0.7 MPa.
Yes, the SAI125X900-S is built to the ISO 15552 profile standard, making it dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke. Mounting accessories like FA flanges or TC trunnions match this standard interface.
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