Airtac SAI125 Standard Air Cylinder SAI125X55S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X55S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X55S
The AirTAC SAI125X55-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a robust push force of 6136 N at 0.5 MPa. Its 55 mm stroke is a custom non-standard length, making it ideal for specialized short-travel clamping tasks. The extruded aluminum barrel design ensures rigid performance without tie-rods.
This variant includes a built-in magnet for non-contact position detection, pairing seamlessly with CMSE or DMSE series sensor switches mounted in the dual side grooves. It utilizes a standard carbon steel piston rod and a PT tapered port thread, ensuring straightforward integration into existing pneumatic setups.
Airtac SAI125 Standard Air Cylinder SAI125X55S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X55S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAI125X55S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAI125X55S Is Used
Heavy-Duty Pressing
Applies 6136 N of force at 0.5 MPa for securely seating large bearings and heavy mechanical components into rigid housings.
Industrial Clamping
Provides intense short-stroke holding power for locking massive steel workpieces securely in place during aggressive machining operations.
Injection Molding Ejection
Utilizes the integrated magnet and CMSE sensors to verify the extended position before safely ejecting dense molded parts from heavy tooling.
Is the Airtac SAI125 Standard Air Cylinder SAI125X55S the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when an application demands substantial thrust that smaller bores cannot provide, such as moving loads requiring over 6000 N at just 0.5 MPa. If the 6136 N output is excessive, stepping down to an 80 mm bore reduces the push force to 2513 N at 0.5 MPa, optimizing air consumption.
Because the 55 mm stroke is a made-to-order dimension, confirm lead times before finalizing your design. For operations that must maintain position during a complete loss of supply air, this standard cylinder will drift; integrate an external pilot-operated check valve or specify the SAIL locking variant to secure the load safely.
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 SAI125X55S FAQ
At 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 SAI125X55-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with a 125 mm bore and 55 mm stroke, provided your mounting accessories match.
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