Airtac SAI125 Standard Air Cylinder SAI125BX250
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX250 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX250
The AirTAC SAI125X250 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at just 0.5 MPa, it handles substantial workloads with ease. The 250 mm stroke provides ample extension for large clamping, lifting, or press operations.
Built with a corrosion-resistant SUS304 stainless steel piston rod (material code B), this model is ideal for environments where moisture or minor chemical exposure is a concern. It utilizes PT tapered port threads for a secure, leak-free pneumatic connection. As a genuine AirTAC component, it guarantees dimensional interchangeability with other ISO 15552 standard cylinders.
Airtac SAI125 Standard Air Cylinder SAI125BX250 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX250 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAI125BX250
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SAI125BX250 Is Used
Heavy-Duty Stamping
Provides the necessary 6136 N push force at 0.5 MPa for forming and stamping robust metal components.
Automotive Assembly
Ideal for pressing large bearings or seating heavy automotive sub-assemblies along its 250 mm stroke.
Pallet Handling
Lifts and positions heavy loaded pallets in automated distribution centers using PT-threaded air lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX250 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires upward of 6000 N of thrust at 0.5 MPa but does not demand the full 10053 N force of the 160 mm bore size. The 250 mm stroke is a standard length, keeping lead times short. For applications needing multi-position stopping or exact intermediate strokes, consider the SAIJ adjustable stroke variant.
Because this is a 250 mm stroke, side-load bending risks are lower than longer extensions, but always ensure the load is guided externally if heavy lateral forces are present. Note that the standard SAI does not hold position when air pressure is removed; for suspended loads requiring safety drop-prevention, specify the SAIL air-released lock or BSAI bidirectional clamp-lock variant.
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 SAI125BX250 FAQ
The SAI125X250 generates a push force of 6136 N and a pull force of 5734 N at an operating pressure of 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X250 is a genuine ISO 15552 profile cylinder, making its mounting interface and envelope dimensions fully interchangeable with other ISO 15552 standard cylinders from brands like Festo or SMC.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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