Airtac SAI125 Standard Air Cylinder SAI125AX450
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX450 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 SAI125AX450
The AirTAC SAI125X450 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 payloads across its 450 mm stroke. The extruded aluminum barrel design omits tie-rods, offering a clean profile that is dimensionally interchangeable with other ISO 15552 cylinders.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid or mildly chemically exposed environments. It utilizes PT tapered port threads, and because it lacks the integrated magnet option, it is optimized for pure pneumatic actuation rather than electronic position sensing.
Airtac SAI125 Standard Air Cylinder SAI125AX450 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX450 |
|---|---|
| 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 SAI125AX450
| 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 SAI125AX450 Is Used
Heavy Machinery Forming
Provides the 6136 N thrust required to actuate heavy forming presses and stamping dies where high impact force is necessary.
Bulk Material Diverting
Drives robust diverter arms on heavy-duty aggregate or metal scrap conveyors, easily pushing dense loads across the 450 mm stroke.
Pallet Handling Gates
Operates large industrial safety gates and heavy pallet stops in automated high-bay warehouses, ensuring stable movement of massive loads.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX450 the Right Cylinder?
Selecting this 125 mm bore is ideal when a 100 mm bore (offering 3927 N push at 0.5 MPa) cannot generate the necessary thrust for heavy lifting, but a 160 mm bore is physically too large for the machine envelope. Operating at a maximum speed of 30-500 mm/s, this cylinder is built for controlled, high-power movements rather than rapid cycling.
Because the stroke is 450 mm, the extended piston rod is susceptible to bending under side loads. To prevent premature rod-bearing wear, implement an external guide rail or use a guided cylinder carriage. Furthermore, standard double-acting cylinders cannot hold a load if air pressure drops; for vertical applications requiring fail-safe holding, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants. To match this exact footprint, specify a 125 mm bore, 450 mm stroke, PT G1/2 ports, and your required mounting accessory.
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 SAI125AX450 FAQ
At an 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 is a true ISO 15552 profile cylinder. Its standardized mounting dimensions make it a drop-in replacement for other ISO 15552 cylinders, provided you match the 125 mm bore, 450 mm stroke, and G1/2 port size.
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