Airtac SAI125 Standard Air Cylinder SAI125BX290
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX290 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX290
The AirTAC SAI125X290 is a double-acting ISO 15552 profile cylinder offering 6136 N push force at 0.5 MPa. Its 290 mm stroke handles substantial linear movement tasks requiring high thrust. The extruded aluminum barrel design omits tie rods, providing a clean exterior that integrates seamlessly into modern machinery.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads, and because a magnet is not specified, it operates without integrated magnetic sensing. For operations needing end-position locking, the SAIL variant provides an air-released brake.
Airtac SAI125 Standard Air Cylinder SAI125BX290 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX290 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAI125BX290
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAI125BX290 Is Used
Heavy Mold Clamping
Provides the 6136 N force needed to secure large injection molds during processing operations.
Press Ejection Systems
Ejects heavy finished metal parts from press beds using its 290 mm stroke and high thrust capacity.
Bulk Material Diverting
Drives robust diverter arms on heavy-duty conveyor lines handling dense industrial materials.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX290 the Right Cylinder?
This 125 mm bore generates 6136 N at 0.5 MPa, bridging the gap between the 80 mm (2513 N) and 160 mm (10053 N) models. Select this size when your pneumatic system requires pushing heavy jigs or clamping large molds that exceed the capability of mid-range cylinders.
With a 290 mm stroke, the unsupported rod length is significant. Always use an external guide rail or a guided cylinder to prevent rod-bearing bending under side loads. Note that this standard cylinder will drift if air pressure is lost; use the BSAI clamp-lock variant if mid-stroke holding is required. As a true ISO 15552 cylinder, it mounts interchangeably using standard TC trunnion or FA flange accessories.
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 SAI125BX290 FAQ
At 0.5 MPa, the SAI125X290 delivers 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X290 is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with matching 125 mm bores.
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