Airtac SAI125 Standard Air Cylinder SAI125X270S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X270S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X270S
The AirTAC SAI125X270-S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and 270mm stroke. It delivers a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for heavy-duty actuation over a moderate stroke distance. The extruded aluminum barrel design eliminates tie rods while maintaining strict dimensional interchangeability with other ISO 15552 mounting interfaces.
This specific configuration includes a standard magnet (-S) for direct compatibility with CMSE and DMSE series sensor switches, which seat securely into the dual sensor grooves machined into both sides of the barrel. The piston rod is constructed from carbon steel for high tensile strength, and the tapered PT port threads ensure a reliable, leak-free pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125X270S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X270S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAI125X270S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAI125X270S Is Used
Heavy Stamping
Provides the necessary 6136 N of thrust at 0.5 MPa to actuate large mechanical stamping presses and metal-forming dies.
Pallet Diversion
Generates enough force to redirect heavy-loaded pallets on high-throughput conveyor lines without skipping or stalling.
Automotive Welding
Moves heavy welding fixtures and clamps large structural components securely into position on automotive assembly lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125X270S the Right Cylinder?
With a 125mm bore, this model sits comfortably in the upper force range; stepping down to a 100mm bore reduces the push force to 3927 N at 0.5 MPa, while moving up to a 160mm bore yields 10053 N. The 270mm stroke falls below the 300mm threshold where severe side-load bending typically occurs, but external guides are still recommended if the load is offset or heavily cantilevered. Because this is a standard double-acting cylinder, it relies on continuous air pressure to hold position; if an application requires mechanical load holding upon pressure loss, the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants are better choices. For direct replacement, match the 125mm bore, 270mm stroke, G1/2 port, and required mounting accessories (such as CA clevis or TC trunnion) to the ISO 15552 interface.
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 SAI125X270S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X270-S is dimensionally interchangeable per ISO 15552. You can match the 125mm bore, 270mm stroke, G1/2 port, and mounting interface to replace equivalent profile cylinders from other manufacturers.
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