Airtac SAI125 Standard Air Cylinder SAI125AX475S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX475S 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 SAI125AX475S
The AirTAC SAI125X475-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It generates a substantial 6136 N of push force at 0.5 MPa, extending 475 mm to move sizable payloads through long travel distances. The extruded aluminum barrel design omits traditional tie-rods, providing a clean exterior that resists contamination.
This specific configuration includes a SUS420J2 stainless steel piston rod (option A) for superior corrosion resistance compared to standard carbon steel. Equipped with a built-in magnet (-S), the cylinder seamlessly integrates with CMSE and DMSE reed switches mounted into the dual-side sensor grooves. Fluid supply connects via tapered PT ports sized at G1/2.
Airtac SAI125 Standard Air Cylinder SAI125AX475S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX475S |
|---|---|
| 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 SAI125AX475S
| 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 SAI125AX475S Is Used
Heavy Stamping
Provides the 6136 N force needed to actuate large metal forming and stamping presses over long strokes.
Pallet Transfer
Pushes fully loaded pallets between conveyor lines, utilizing the 475 mm travel to bridge wide gaps.
Automotive Welding
Positions heavy chassis sub-assemblies, relying on the SUS420J2 rod to withstand minor weld spatter exposure.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX475S the Right Cylinder?
Choosing this 125 mm bore over the neighboring 100 mm version upgrades your thrust from 3927 N to 6136 N at 0.5 MPa, which is critical when scaling up production machinery. Conversely, if your application only requires 3927 N, stepping down to the 100 mm bore saves space and air consumption. This 475 mm stroke falls within the standard limit of 1500 mm for this bore size.
Because the stroke exceeds 300 mm, the extended rod is highly susceptible to bending under side loads. We recommend using an external guide rail or a guided cylinder to prevent rod-bearing damage. Note that the adjustable air cushions only decelerate the piston at stroke ends; they do not lock the load. If your machinery must hold a load vertically without continuous air pressure, integrate the SAIL variant or an external rod lock.
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 SAI125AX475S FAQ
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. If you increase pressure to 0.7 MPa, the push force rises to 8590 N.
Yes. The SAI125X475-S is dimensionally interchangeable per the ISO 15552 standard, meaning it serves as a drop-in replacement for other ISO 15552 profile cylinders with matching 125 mm bore and 475 mm stroke specifications.
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