Airtac SAI125 Standard Air Cylinder SAI125AX240
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX240 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX240
The AirTAC SAI125X240 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125mm bore unit handles substantial loads with a 240mm stroke. The extruded aluminum barrel eliminates tie-rods, providing a clean profile that drops directly into standardized ISO 15552 mounting interfaces.
Built for demanding environments, this specific configuration utilizes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance. It features PT tapered port threads and operates without a magnet. For applications requiring position holding without constant air pressure, the SAIL variant offers an integrated air-released lock.
Airtac SAI125 Standard Air Cylinder SAI125AX240 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX240 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAI125AX240
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAI125AX240 Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate large stamping presses and form heavy-gauge metal components securely.
Injection Molding
Extracts large molded parts from injection machines, utilizing the 240mm stroke to safely clear the mold cavity during high-volume production cycles.
Pallet Handling
Lifts and positions heavy loaded pallets on packaging lines, where the 125mm bore delivers the necessary raw thrust for vertical elevation.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX240 the Right Cylinder?
Select this 125mm bore cylinder when 80mm bore models (providing 2513 N at 0.5 MPa) lack the necessary thrust. At 240mm stroke, the SAI125X240 is well within standard limits but still requires careful attention to side-load management. Heavy lateral forces can bend the rod and accelerate bearing wear, so utilize external guide rails or a guided cylinder carriage for optimal longevity.
Because it is a double-acting cylinder, it relies on continuous air pressure to maintain its position. If air is exhausted or the valve is centered, the piston will drift or drop. The adjustable air cushions at both ends only decelerate the piston near stroke end; they do not function as a braking mechanism. Ensure your ISO 15552 replacement matches the 125mm bore, 240mm stroke, PT G1/2 port, and required mounting accessories like FA flange or TC trunnion.
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 SAI125AX240 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
The SAI125X240 is dimensionally interchangeable per ISO 15552 standards, meaning it matches the mounting footprint of other ISO 15552 cylinders. It is not identical to a specific brand's part, but it serves as a direct drop-in replacement for standard 125mm bore, 240mm stroke configurations with a G1/2 port.
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