Airtac SAI125 Standard Air Cylinder SAI125AX350S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX350S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX350S
The AirTAC SAI125X350-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 8590 N at 0.7 MPa, making it well-suited for high-load pressing and lifting tasks over its 350 mm stroke. The extruded aluminum barrel design omits tie rods, offering a clean profile that integrates seamlessly into modern machine frameworks.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid industrial environments. The -S suffix indicates an integrated magnet, allowing seamless operation with CMSE and DMSE series reed switches via the dual sensor grooves on the barrel. Fluid ports feature PT tapered threading.
Airtac SAI125 Standard Air Cylinder SAI125AX350S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX350S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAI125AX350S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAI125AX350S Is Used
Heavy-Duty Stamping
Applies the 8590 N push force at 0.7 MPa to seat bearings, form sheet metal, or stamp heavy components reliably over a 350 mm travel.
Automated Pressing
Ideal for automotive sub-assembly lines where the SUS420J2 rod resists coolant exposure while the magnet triggers CMSE switches for part verification.
Pallet Lifting
Raises heavy pallets or chassis frames during material handling, utilizing the full 350 mm stroke to clear conveyor obstructions safely.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX350S the Right Cylinder?
When configuring heavy automation, compare this 125 mm bore against the 160 mm option, which steps up to 14074 N at 0.5 MPa, or the 100 mm bore, which provides 5497 N at 0.7 MPa if a lighter footprint is sufficient. The 350 mm stroke on this model requires careful attention to side-load management; long unsupported rods are prone to bending under off-center loads. Utilize an external guide rail or select a guided cylinder to prevent premature rod-bearing wear.
This model serves as a drop-in replacement for other ISO 15552 profile cylinders. To complete your setup, pair this 125 mm bore with PT porting, an appropriate mounting accessory (such as a CA clevis or LB foot bracket), and CMSE sensors. Remember that the adjustable air cushions only decelerate the piston near the stroke ends; they do not hold a load. If your application requires dead-stop holding without live air pressure, specify the SAIL or BSAI locking variant.
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 SAI125AX350S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N.
No, the standard SAI cylinder does not hold position without constant air pressure. The adjustable cushions only slow the piston at stroke ends. For fail-safe load holding, use the SAIL or BSAI variant.
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