Airtac SAI125 Standard Air Cylinder SAI125X40S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X40S
The AirTAC SAI125X40-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It supplies a robust 6136 N of push force at 0.5 MPa and 8590 N at 0.7 MPa across its 40 mm stroke. This short-stroke configuration is tailored for high-impact pressing and heavy clamping tasks. As a genuine AirTAC component, it guarantees reliable performance in rigorous industrial environments.
This model includes a magnetic piston for position sensing, working seamlessly with CMSE and DMSE switches mounted in the dual sensor grooves along the extruded aluminum barrel. The standard carbon steel piston rod provides excellent tensile strength, while the PT tapered port threads ensure a secure, leak-free pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125X40S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAI125X40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAI125X40S Is Used
Heavy-Duty Stamping
Provides the intense 8590 N output force at 0.7 MPa needed for short-stroke metal forming and stamping operations.
Pallet Clamping
Secures heavy pallets or large workpieces firmly in place during machining or automated packaging cycles.
Industrial Pressing
Ideal for pressing bearings or heavy components into housings where a brief, high-force stroke is required.
Is the Airtac SAI125 Standard Air Cylinder SAI125X40S the Right Cylinder?
Select this 125 mm bore actuator when your application demands significantly more thrust than a 100 mm bore can provide, which typically delivers 3927 N at 0.5 MPa. The 40 mm stroke is optimal for brief, high-power movements. Because the standard SAI relies on adjustable air cushions at both ends solely for end-of-stroke deceleration, it will not hold a load if air pressure drops. For vertical loads requiring fail-safe holding, consider the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder.
To integrate this cylinder, match the 125 mm bore, 40 mm stroke, G1/2 port, and your required mounting accessory, such as an FA flange or TC trunnion. The integrated magnet (-S) allows for precise end-of-stroke detection without external limit switches.
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 SAI125X40S FAQ
This 125 mm bore cylinder generates a push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa, with a pull force of 5734 N at 0.5 MPa.
Yes, the SAI125X40-S is dimensionally interchangeable per ISO 15552, allowing it to serve as a drop-in replacement for other standard profile cylinders with the same 125 mm bore and 40 mm stroke.
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