Airtac SAI125 Standard Air Cylinder SAI125AX35S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX35S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX35S
The AirTAC SAI125X35-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this short 35 mm stroke variant excels in high-impact clamping and holding tasks. The extruded aluminum barrel design omits tie rods, providing a clean exterior that simplifies mounting and maintenance.
This specific configuration ships with a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid manufacturing environments. Equipped with a magnetic piston (-S), it seamlessly integrates with CMSE and DMSE series reed switches seated in the dual sensor grooves along the barrel.
Airtac SAI125 Standard Air Cylinder SAI125AX35S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX35S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAI125AX35S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAI125AX35S Is Used
Heavy-Duty Stamping
Provides the immense 6136 N output force needed to execute short-stroke stamping and forming operations on thick metal sheets.
Pallet Halting
Acts as a high-force stopper mechanism on heavy-load conveyor lines, using its 35 mm stroke to arrest pallet momentum securely.
Injection Mold Ejection
Utilizes the SUS420J2 rod to push heavy molded components out of machinery, resisting moisture and cooling fluid exposure.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX35S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when 402 N of thrust from a 32 mm bore is insufficient for heavy material handling. For applications requiring position holding during air loss, note that the standard adjustable air cushions only decelerate the piston near stroke end; they do not act as a brake. Implement the SAIL variant or an external pilot-operated check valve for secure load locking.
Replacement and installation require specifying the 125 mm bore, 35 mm stroke, G1/2 port with PT tapered threads, and appropriate mounting accessories like TC trunnion or LB foot brackets. The integrated magnet (-S) ensures out-of-the-box compatibility with standard ISO 15552 mounting dimensions and sensor setups.
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 SAI125AX35S 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 0.7 MPa, the push force increases to 8590 N.
No, the standard SAI cylinder does not hold position without live pressure. The adjustable cushions only slow the piston at stroke end. For fail-safe load holding, use the SAIL (air-released lock) or BSAI (clamp-lock) variant.
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