Airtac SAI125 Standard Air Cylinder SAI125AX270S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX270S 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 SAI125AX270S
The AirTAC SAI125X270-S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 270mm stroke. Because 270mm is not a standard catalog length, it is manufactured as a made-to-order non-standard stroke. It delivers a robust 6136 N of push force at 0.5 MPa, making it well-suited for moving heavy industrial loads.
This variant includes a magnet for proximity sensing and is equipped with a SUS420J2 stainless steel piston rod for enhanced corrosion resistance. The extruded aluminum barrel features sensor grooves on both sides for CMSE or DMSE switches, and the PT tapered port threads ensure a tight, reliable pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX270S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX270S |
|---|---|
| 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 SAI125AX270S
| 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 SAI125AX270S Is Used
Heavy Stamping
Provides the necessary 6136 N of push force at 0.5 MPa to drive heavy metal stamping and forming presses.
Pallet Diversion
Handles the robust actuation required to divert heavy loaded pallets on high-throughput material handling lines.
Automated Clamping
Secures large automotive components or heavy machinery frames during machining and welding operations.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX270S the Right Cylinder?
This 125mm bore provides 6136 N of push force at 0.5 MPa; if your application requires less force, stepping down to the 100mm bore yields 3927 N, while moving up to the 160mm bore offers 10053 N. Because this is a 270mm stroke, the extended rod is susceptible to bending under side loads; utilizing an external guide rail or a guided cylinder is recommended to prevent rod-bearing damage.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any cylinder sharing the ISO 15552 mounting interface. Note that the adjustable air cushion at both ends only decelerates the piston near stroke end and does not hold the load; if power drops, the piston will drift. For position holding without live pressure, consider the SAIL or BSAI locking variants.
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 SAI125AX270S FAQ
At 0.5 MPa, 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 SAI is a genuine ISO 15552 profile cylinder, meaning it is dimensionally interchangeable with other ISO 15552 cylinders. Just match the bore, stroke, PT port, and mounting accessories.
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