Airtac SAI125 Standard Air Cylinder SAI125BX450S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX450S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX450S
The AirTAC SAI125X450-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for moving substantial masses across its 450 mm travel distance. The extruded aluminum barrel design omits tie rods, presenting a clean exterior that aligns with global ISO 15552 mounting dimensions.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh production environments. It is equipped with a magnetic piston (-S) that directly interfaces with CMSE and DMSE series sensor switches, which seat neatly into the dual sensor grooves molded into the barrel. Fluid ports feature PT tapered threads, and adjustable air cushions at both ends absorb kinetic energy at stroke completion.
Airtac SAI125 Standard Air Cylinder SAI125BX450S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX450S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAI125BX450S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAI125BX450S Is Used
Heavy Material Lifts
Ideal for elevating heavy metal billets or automotive sub-assemblies, utilizing the full 6136 N push force to overcome gravity and inertia during vertical transfer.
Large Press Ejection
Provides the robust physical stroke required to eject dense molded components or stamped parts from heavy machinery across a 450 mm clearance gap.
Pallet Diverting
Acts as a high-power diverter arm on heavy-duty packaging lines, using the integrated magnet and CMSE sensors to confirm full extension before product routing.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX450S the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant is justified when the 3927 N push force at 0.5 MPa is insufficient for your payload. Conversely, if your application requires less than 6000 N of thrust, stepping down to the 80 mm bore (2513 N at 0.5 MPa) can save space and air consumption. The 450 mm stroke is well within the 1500 mm standard maximum for this bore, ensuring straightforward availability.
Because this stroke measures 450 mm, the extended rod is susceptible to bending under side loads. To protect the rod bearing and prevent premature wear, implement an external linear guide or utilize a dedicated guided cylinder to absorb lateral forces. If your machinery must hold a load vertically or maintain position safely upon air loss, the standard adjustable cushions will not act as a brake; you must specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant to prevent drifting.
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 SAI125BX450S FAQ
At a standard operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X450-S is dimensionally interchangeable per ISO 15552 profile cylinder standards. It matches the mounting interface and center distances of other ISO 15552 cylinders, allowing it to serve as a drop-in replacement without requiring custom brackets.
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