Airtac SAI125 Standard Air Cylinder SAI125BX300
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX300 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX300
The AirTAC SAI125X300 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N and a pull force of 5734 N at 0.5 MPa, this 125mm bore unit is built for substantial loads. The 300mm stroke provides ample travel for pressing, lifting, and indexing tasks. Its extruded aluminum barrel omits tie-rods, offering a clean exterior that simplifies mounting and cleaning.
This specific configuration features a SUS304 stainless steel piston rod (option B), providing superior corrosion resistance for humid or chemically active settings. Because a magnet is not specified, this unit is optimized for pure force transmission rather than position sensing. The adjustable air cushions at both ends absorb kinetic energy effectively within the 30-500 mm/s speed range specific to this larger bore size.
Airtac SAI125 Standard Air Cylinder SAI125BX300 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX300 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 SAI125BX300
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SAI125BX300 Is Used
Heavy-Duty Pressing
Generates 8590 N of thrust at 0.7 MPa, making it ideal for assembling bearings, stamping components, and forming rigid materials.
Pallet Lifting
The 300mm stroke provides the vertical travel needed to elevate heavy industrial pallets or chutes in automated distribution centers.
Bulk Material Indexing
Pushes heavy product batches or positioning fixtures along conveyor lines, utilizing the robust 125mm profile barrel for structural stability.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX300 the Right Cylinder?
Selecting this 125mm bore cylinder is appropriate when a 100mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust, but stepping up to a 160mm bore (10053 N) would be excessive. At 300mm of stroke, the extended rod is subject to bending under side loads. To prevent premature seal wear and rod-bearing failure, guide the load externally or utilize a guided cylinder carriage rather than relying on the piston rod to absorb lateral forces.
This model uses a PT tapered G1/2 port and mounts via standard ISO 15552 accessories like TC trunnions or FA flanges. As a standard double-acting cylinder, it will drift if air pressure is lost. If your application requires the load to be mechanically held during an exhaust or pressure-drop event, integrate an external pilot-operated check valve or select the SAIL variant with an air-released lock.
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 SAI125BX300 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If operating pressure increases to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X300 is dimensionally interchangeable with other ISO 15552 profile cylinders. You can swap it using your existing mounting accessories, PT G1/2 port connections, and 125mm bore spacing.
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