Airtac SAI125 Standard Air Cylinder SAI125X350
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X350 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 SAI125X350
The AirTAC SAI125X350 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and 350mm stroke. It delivers a robust push force of 6136N at 0.5 MPa, making it well-suited for heavy-duty actuation tasks. The extruded aluminum barrel design omits tie rods while maintaining strict dimensional interchangeability with other ISO 15552 cylinders.
This specific configuration features a standard carbon steel piston rod and PT tapered port threads. Because a magnet is not specified, it relies on external positioning or limit valves rather than internal sensor tracks. For applications requiring extreme heat resistance, the standard TPU seals can be swapped for Viton (H) alternatives, and if dual-end rod actuation is needed, the SAID variant is available.
Airtac SAI125 Standard Air Cylinder SAI125X350 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X350 |
|---|---|
| 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 SAI125X350
| 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 SAI125X350 Is Used
Heavy Stamping
Provides the high thrust necessary for metal forming, stamping, and riveting operations in automotive assembly lines.
Pallet Handling
Acts as a robust diverting or lifting mechanism for heavy pallets and workpieces on automated conveyor systems.
Press Equipment
Integrates into hydraulic and pneumatic press machinery where sustained pressure and long-stroke actuation are required.
Is the Airtac SAI125 Standard Air Cylinder SAI125X350 the Right Cylinder?
With a 350mm stroke, this model operates within the standard range but requires careful mounting to prevent rod-bearing bending under side loads. Utilizing an external guide mechanism or a fully guided cylinder is strongly recommended for this length to protect the piston rod. If your application requires less force, stepping down to the 80mm bore yields 2513N at 0.5 MPa; conversely, moving up to the 160mm bore provides 10053N for heavier loads.
The standardized ISO 15552 mounting interface allows seamless integration using FA flanges or TC trunnion brackets. Operating speed is 30-500 mm/s. Note that this standard cylinder does not hold loads upon air loss; 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 SAI125X350 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
Yes, the SAI125X350 is dimensionally interchangeable per ISO 15552 standards, meaning it matches the mounting footprints and port sizes of cylinders from brands like Festo or SMC.
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