Airtac SAI125 Standard Air Cylinder SAI125AX135S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX135S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX135S
The AirTAC SAI125X135-S 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 high-thrust pressing and heavy load transfer over its 135 mm stroke. The extruded aluminum barrel design ensures rigid, tie-rod-less construction that drops directly into standard ISO 15552 mounting interfaces.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid or mildly chemically washed environments. Equipped with a magnet (-S), it supports direct mounting of CMSE or DMSE sensor switches along the dual grooves on the barrel. The cylinder operates at speeds of 30-500 mm/s and utilizes PT tapered port threads for secure pneumatic connections.
Airtac SAI125 Standard Air Cylinder SAI125AX135S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX135S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAI125AX135S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAI125AX135S Is Used
Heavy-Duty Stamping
Generates 8590 N of thrust at 0.7 MPa to form and stamp thick metal components securely in automated fabrication lines.
Injection Mold Ejection
Provides the high pull force necessary to extract large molded parts from heavy industrial tooling without hesitation.
Pallet Diverting
Acts as a robust diverter arm in high-mass conveyor systems, utilizing the integrated magnet to confirm stroke endpoints.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX135S 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 sufficient force, but a larger 160 mm bore would be physically oversized. Because the 135 mm stroke is relatively short for this high-thrust class, side-load stress on the rod bearing is naturally minimized compared to longer strokes. However, if your mechanism experiences inherent lateral loads, pairing this cylinder with an external guide rail will maximize seal and bearing longevity.
As a standard double-acting cylinder, this model relies on continuous air pressure to move and hold its load; it will drift if pressure is lost or exhausted. If your application demands true fail-safe position holding without live air, consider the AirTAC SAIL variant with an air-released lock, or the BSAI bidirectional clamp-lock cylinder. To match existing tooling, this unit can be installed using FA or FB flange accessories, CA clevis mounts, or TC trunnion brackets, all conforming to ISO 15552 dimensions.
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 SAI125AX135S FAQ
At 0.5 MPa, it provides a push force of 6136 N and a pull force of 5734 N. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X135-S is dimensionally interchangeable per ISO 15552. You can drop it into existing mounting footprints using standard LB, FA, or TC accessories without modifying the machine frame.
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