Airtac SAI125 Standard Air Cylinder SAI125X140
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X140 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X140
The AirTAC SAI125X140 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, this 125mm bore unit handles demanding industrial cycles with ease. The extruded aluminum barrel design omits traditional tie-rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration features a standard carbon steel piston rod and PT tapered port threads. Because a magnet is not specified, it operates without integrated position sensing. For environments requiring elevated thermal resistance, the standard TPU seals can be substituted with Viton (H) or NBR (N) options to match specific operational demands.
Airtac SAI125 Standard Air Cylinder SAI125X140 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X140 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAI125X140
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAI125X140 Is Used
Heavy Stamping
Provides the necessary 6136 N thrust at 0.5 MPa for forming and stamping thick metal components in automated fabrication lines.
Wood Processing
Drives heavy cutting heads and clamping fixtures in timber manufacturing, utilizing the robust 125mm bore for high force output.
Pallet Handling
Actuates large-scale lifting arms to position loaded pallets, relying on the durable carbon steel rod for structural integrity.
Is the Airtac SAI125 Standard Air Cylinder SAI125X140 the Right Cylinder?
Selecting the SAI125X140 is ideal when applications exceed the 3927 N push capacity of the 100mm bore at 0.5 MPa but do not require the full 10053 N output of the 160mm variant. Its 140mm stroke provides substantial linear movement for heavy lifting or pressing tasks. To ensure seamless integration, this cylinder serves as a dimensionally interchangeable drop-in replacement for other ISO 15552 profile cylinders, utilizing a G1/2 port and supporting standard mounting accessories like FA flanges or TC trunnions.
Keep in mind that the adjustable air cushions at both ends strictly decelerate the piston near stroke limits to prevent impact damage; they do not function as a braking mechanism. If your machinery must maintain a load position safely during a complete loss of air pressure, specify the SAIL variant with an air-released lock or utilize an external pilot-operated 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 SAI125X140 FAQ
At a 0.5 MPa operating pressure, the SAI125X140 generates a push force of 6136 N and a pull force of 5734 N. If pressure increases to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X400 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 cylinders from brands like Festo or SMC, provided the port and mounting dimensions match.
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