Airtac SAI125 Standard Air Cylinder SAI125AX275
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX275 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX275
The AirTAC SAI125X275 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation, delivering a robust push force of 6136 N at 0.5 MPa. Its extruded aluminum barrel omits tie-rods for a clean, rigid exterior. The 275 mm stroke provides substantial linear travel for large-scale material handling and pressing operations.
This configuration features a SUS420J2 stainless steel piston rod (option A) for superior corrosion resistance in humid or washdown environments. It utilizes PT tapered port threads and lacks an integrated magnet, meaning position sensing via CMSE or DMSE switches is not enabled for this specific unit.
Airtac SAI125 Standard Air Cylinder SAI125AX275 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX275 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAI125AX275
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SAI125AX275 Is Used
Heavy-Duty Stamping
Provides the necessary 6136 N push force at 0.5 MPa for forming, riveting, and pressing heavy metal or plastic components.
Bulk Material Diverting
Drives large-scale diverter arms on conveyor lines where the 275 mm stroke moves substantial product flows efficiently.
Automated Clamping
Secures large workpieces or molds during CNC machining or welding operations, utilizing the robust 125 mm bore power.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX275 the Right Cylinder?
Selecting this 125 mm bore makes sense when the 80 mm class (2268 N pull at 0.5 MPa) is insufficient for your load, but you want to avoid the larger 160 mm footprint. At 275 mm stroke, the unsupported rod length is moderate, but side loads can still accelerate wear on the rod bearing and seals; utilizing external guide rails or a guided cylinder carriage is recommended if heavy eccentric loads are present.
As a true ISO 15552 profile cylinder, this model serves as a drop-in dimensional replacement for other ISO 15552 cylinders of the same bore and stroke. Remember that the adjustable air cushions only decelerate the piston near the stroke ends; they do not lock the rod. If your machinery loses air pressure and must hold a load safely, specify the SAIL variant with an air-released lock or install an external pilot check valve.
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 SAI125AX275 FAQ
This 125 mm bore cylinder provides 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 SAI125X275 is dimensionally interchangeable per ISO 15552 mounting dimensions, making it a drop-in replacement for other standard profile cylinders of the same bore and stroke.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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