Airtac SAI125 Standard Air Cylinder SAI125AX225S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX225S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX225S
The AirTAC SAI125X225-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit is built to handle substantial loads across its 225 mm stroke. The extruded aluminum barrel design omits tie-rods, providing a clean profile that is dimensionally interchangeable per ISO 15552 standards.
Equipped with a magnet (-S), this model supports CMSE and DMSE sensor switches via dual grooves on the barrel. It features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance, PT tapered G1/2 ports, and adjustable air cushions at both ends to manage high kinetic energy smoothly.
Airtac SAI125 Standard Air Cylinder SAI125AX225S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX225S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAI125AX225S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAI125AX225S Is Used
Heavy Stamping
Provides the high thrust necessary for forming and stamping thick metal components in automated presses.
Large Material Handling
Actuates heavy-duty lift gates and diverter arms on conveyor systems moving bulk materials.
Plastic Injection Molding
Drives large core pulls and heavy ejector mechanisms within injection molding machinery.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX225S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when a 100 mm bore falls short—yielding 6136 N at 0.5 MPa compared to the 100 mm bore's 3927 N. If your application requires less force, stepping down to an 80 mm bore provides 2513 N. For this 225 mm stroke, side-load is moderate, but ensuring proper rod-bearing alignment is crucial to prevent premature wear.
As a standard double-acting cylinder, this model relies on continuous air pressure to maintain its position; if air is exhausted or the valve is centered, the piston will drift. For applications requiring strict load holding without live pressure, consider the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder. This SAI125X225-S is a direct drop-in replacement for any ISO 15552 cylinder matching its 125 mm bore, 225 mm stroke, and G1/2 port specifications.
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 SAI125AX225S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X225-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with a 125 mm bore, 225 mm stroke, and G1/2 ports.
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