Airtac SAI125 Standard Air Cylinder SAI125X475
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X475 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X475
The AirTAC SAI125X475 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit utilizes a 475 mm stroke to drive substantial loads. The extruded aluminum barrel omits tie-rods, presenting a clean exterior that drops directly into standardized ISO 15552 mounting interfaces.
Configured with a standard carbon steel piston rod and PT tapered port threads, this model is built for industrial durability. Without a magnet, it relies on external positioning or limit switches, but the barrel retains dual sensor grooves should you later integrate CMSE or DMSE switches. For applications requiring multi-directional clamping or fail-safe holding under pressure loss, consider the related BSAI bidirectional clamp-lock variant.
Airtac SAI125 Standard Air Cylinder SAI125X475 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X475 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAI125X475
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAI125X475 Is Used
Heavy-Duty Stamping
Provides the necessary 6136 N thrust at 0.5 MPa for pressing bearings or forming thick metal components in automated fabrication lines.
Large Material Handling
Drives robust lifting and pushing mechanisms for heavy palletized goods or large automotive sub-assemblies on the factory floor.
Plastic Injection Unloading
Utilizes the 475 mm stroke to extract large molded plastic parts from deep injection molding machines, moving them safely to downstream conveyors.
Is the Airtac SAI125 Standard Air Cylinder SAI125X475 the Right Cylinder?
Selecting this 125 mm bore over the 100 mm version is justified when you need to exceed the 100 mm bore's 3927 N push force at 0.5 MPa, stepping up to 6136 N for heavier payloads. The 475 mm stroke falls within the 125 mm bore's 1500 mm maximum standard stroke limit. However, at this extended length, the unsupported carbon steel rod is highly susceptible to bending under side loads; utilizing an external guide rail or a fully guided cylinder mechanism is critical to prevent premature rod-bearing wear.
This model features a G1/2 port and M27x2 rod thread. As a true ISO 15552 profile cylinder, it serves as a dimensionally interchangeable replacement for other ISO 15552 cylinders of identical bore and stroke. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold loads. If your application requires vertical load holding without air pressure, an external pilot-operated check valve or the SAIL locking cylinder variant is required.
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 SAI125X475 FAQ
The SAI125X475 cylinder generates a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X475 is a genuine ISO 15552 profile cylinder. It is dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke, utilizing standard mounting accessories like FA flanges or TC trunnions.
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