Airtac SAI125 Standard Air Cylinder SAI125X155S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X155S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X155S
The AirTAC SAI125X155-S is a double-acting profile cylinder built to the ISO 15552 standard, ensuring drop-in dimensional interchangeability with other compliant ISO 15552 cylinders. Delivering a robust 6136 N of push force at 0.5 MPa, it is engineered for heavy-duty automation. This specific unit features a 155 mm stroke, which is a made-to-order length outside the standard catalog increments.
This model includes a magnetic piston for use with CMSE and DMSE series reed switches, fitting smoothly into the integrated sensor grooves on both sides of the extruded aluminum barrel. The piston rod is constructed from durable carbon steel, and the PT tapered port threads guarantee a secure, leak-free pneumatic connection in demanding industrial environments.
Airtac SAI125 Standard Air Cylinder SAI125X155S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X155S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 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 SAI125X155S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | 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 SAI125X155S Is Used
Heavy Stamping
Provides the necessary 6136 N of push force at 0.5 MPa to operate heavy-duty stamping and forming presses reliably.
Automotive Assembly
Ideal for pressing automotive components and handling substantial payloads along ISO 15552 standardized mounting interfaces.
Pallet Handling
Drives robust pallet diversion and lifting mechanisms in high-throughput conveyor systems requiring substantial thrust.
Is the Airtac SAI125 Standard Air Cylinder SAI125X155S the Right Cylinder?
This 125 mm bore provides 6136 N of thrust at 0.5 MPa. If your application requires less force, stepping down to the 100 mm bore yields 3927 N at the same pressure, while moving up to the 160 mm bore offers 10053 N for heavier loads. Because this 155 mm stroke is a non-standard dimension, expect a made-to-order lead time.
For any pneumatic cylinder, losing supply pressure means the piston cannot hold its load and will drift. The adjustable air cushions only decelerate the rod near the end caps; they do not act as a braking mechanism. If your machinery requires true position holding without continuous air pressure, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock version.
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 SAI125X155S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
Yes, the SAI125X155-S is dimensionally interchangeable per the ISO 15552 standard, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders from brands like SMC or Festo using standard mounting accessories.
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