Airtac SAI125 Standard Air Cylinder SAI125BX140
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX140 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 SAI125BX140
The AirTAC SAI125X140 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a robust push force of 6136 N and pull force of 5734 N at 0.5 MPa. Its 140 mm stroke is ideal for substantial linear movement tasks in demanding industrial environments.
This model features a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in harsh environments. It utilizes a PT tapered G1/2 port, and while standard sensors are not included, the extruded aluminum barrel includes dual-side sensor grooves ready for CMSE or DMSE switches if a magnet is added later.
Airtac SAI125 Standard Air Cylinder SAI125BX140 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX140 |
|---|---|
| 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 SAI125BX140
| 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 SAI125BX140 Is Used
Heavy Machinery Forming
Provides the high 6136 N thrust needed to actuate heavy forming presses and industrial stamping equipment.
Bulk Material Handling
Drives large diverter gates and heavy-duty conveyor sorting arms in high-capacity logistics hubs.
Automotive Assembly Jigs
Clamps heavy automotive chassis components securely during welding and robotic assembly processes.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX140 the Right Cylinder?
With a 125 mm bore providing 6136 N of thrust at 0.5 MPa, this cylinder handles heavy loads effectively. If your application requires less force, stepping down to the 100 mm bore yields 3927 N, whereas upgrading to the 160 mm bore offers 10053 N for more demanding cycles. Since the stroke is 140 mm, side-load bending is less prominent, but always ensure proper alignment to prevent premature rod-bearing wear.
This SAI125X140 is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders. It features a PT G1/2 port and supports mounting accessories like FA flanges or TC trunnions. Note that a plain SAI does not hold its load when air pressure is lost; for position holding without live pressure, consider the SAIL locking variant or 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 SAI125BX140 FAQ
At 0.5 MPa, the SAI125X140 delivers 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 SAI125X140 is a genuine ISO 15552 profile cylinder, making it dimensionally interchangeable with other standard ISO 15552 cylinders using the same 125 mm bore and PT G1/2 port.
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