Airtac SAI125 Standard Air Cylinder SAI125BX350
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX350 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX350
The AirTAC SAI125X350 is a double-acting profile cylinder built to the ISO 15552 standard, ensuring drop-in dimensional interchangeability with other ISO 15552 interface cylinders. Delivering a substantial 6136 N of push force at 0.5 MPa, it is engineered for heavy-duty automation tasks requiring a 350 mm stroke.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh or washdown environments. Fluid ports utilize PT tapered threading, and the extruded aluminum barrel includes integrated sensor grooves on both sides for direct CMSE or DMSE switch mounting.
Airtac SAI125 Standard Air Cylinder SAI125BX350 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX350 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAI125BX350
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAI125BX350 Is Used
Heavy Stamping
Provides the high thrust needed for forming, bending, and stamping metal components in automated fabrication lines.
Large Mold Handling
Actuates heavy tooling and molds over its 350 mm stroke, with the SUS304 rod resisting corrosion in humid production environments.
Bulk Material Diversion
Drives large-scale diverter gates and sorting arms on heavy-duty conveyor systems handling bulk materials.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX350 the Right Cylinder?
Selecting this 125 mm bore provides 6136 N push force at 0.5 MPa, offering a significant step up from the 80 mm bore which yields 2513 N. If the 350 mm stroke exceeds your space constraints, the 63 mm bore offers 1559 N in a more compact footprint. Because the 350 mm stroke creates a long unsupported rod extension, side loads can cause bending and premature rod-bearing wear; always guide the load externally or utilize a dedicated guided cylinder to prevent binding.
For applications that must maintain position or hold a load vertically without continuous air pressure, the standard SAI does not provide locking. In those scenarios, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock. This model uses a G1/2 port, M20x1.5 rod thread, and is compatible with FA/FB flange and TC trunnion mounts.
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 SAI125BX350 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X350 is a profile cylinder with an ISO 15552 mounting interface, making it dimensionally interchangeable with other standard ISO 15552 cylinders. It is not a tie-rod design.
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