Airtac SAI125 Standard Air Cylinder SAI125AX250S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX250S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX250S
The AirTAC SAI125X250-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit is built to execute demanding linear motion tasks across industrial environments.
This specific configuration includes a SUS420J2 stainless steel rod for superior corrosion resistance and a pre-installed magnet (-S) for seamless integration with CMSE or DMSE sensor switches along the dual barrel grooves. Operating at speeds of 30-500 mm/s, it provides reliable performance for high-load cycles.
Airtac SAI125 Standard Air Cylinder SAI125AX250S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX250S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAI125AX250S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SAI125AX250S Is Used
Heavy-Duty Stamping
Provides the necessary 6136 N output at 0.5 MPa to drive heavy metal forming, riveting, and stamping presses with consistent reliability.
Pallet Diverting
Handles substantial side loads and mass inertia when shifting loaded pallets on high-throughput packaging and distribution conveyor lines.
Automated Clamping
Secures large workpieces or heavy machinery components during machining, welding, and assembly operations without flexing.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX250S the Right Cylinder?
Selecting this 125 mm bore makes sense when 100 mm falls short, as stepping down to the 100 mm bore drops the 0.5 MPa push force to 3927 N. Conversely, if your application requires even more power, the 200 mm bore yields 15708 N at the same pressure. For this 250 mm stroke, side loads are a primary concern; utilizing external guide rails or a fully guided cylinder helps prevent rod-bearing bending and premature wear.
As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a direct drop-in replacement for other standard ISO 15552 units. To finalize your setup, match the PT port threads, select appropriate mounting accessories (like TC trunnion or FA flange), and leverage the built-in magnet for position sensing. Note that standard air cushions only decelerate the piston at stroke ends and do not hold loads; if power fails, use an external rod lock or the SAIL variant for secure positioning.
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 SAI125AX250S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI series is a genuine ISO 15552 profile cylinder, meaning its mounting interface is dimensionally interchangeable with other ISO 15552 standard cylinders, allowing for straightforward drop-in replacement.
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