Airtac SAI125 Standard Air Cylinder SAI125AX325
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX325 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX325
The AirTAC SAI125X325 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It generates 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it well-suited for moving substantial loads through a 325 mm travel distance. The extruded aluminum barrel omits tie-rods, presenting a clean profile that matches standardized ISO 15552 mounting dimensions exactly.
This specific configuration features an SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid or wash-down environments. It utilizes PT tapered port threads and lacks a piston magnet, meaning it is optimized purely for mechanical actuation without hall-effect sensor tracking. The adjustable air cushions at both ends deliver 40 mm of cushioning stroke to absorb kinetic energy smoothly.
Airtac SAI125 Standard Air Cylinder SAI125AX325 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX325 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAI125AX325
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAI125AX325 Is Used
Heavy Stamp Press
Provides the high 6136 N push force required to drive large metal stamping and forming presses through a 325 mm working stroke.
Pallet Diversion
Actuates heavy-duty lane diverters on conveyor systems, using the long stroke to shift fully loaded pallets between processing lines.
Automated Clamping
Secures large automotive components or steel beams during machining, leveraging the robust SUS420J2 stainless steel rod for environmental resilience.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX325 the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant doubles the available thrust, stepping up from 3927 N to 6136 N at 0.5 MPa, which is critical if your mechanism overcomes heavy spring forces or high friction. If you do not need this much power, dropping to the 100 mm bore saves air consumption and cycle time. Because this 325 mm stroke creates a long unsupported rod when extended, you must manage side loads carefully; using an external linear guide rail or a twin-rail guided cylinder prevents rod-bearing bending and premature seal wear.
As a true ISO 15552 standard cylinder, it serves as a drop-in dimensional replacement for any other ISO 15552 profile cylinder with a 125 mm bore, 325 mm stroke, and G1/2 port. Ensure your mounting accessory (such as a TC trunnion or FA flange) matches the ISO interface. Note that this standard SAI variant will drift if air pressure is lost or the directional valve is centered; it cannot hold a vertical load safely without live pressure. For fail-safe load holding, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant instead.
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 SAI125AX325 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At the maximum rated pressure of 1.0 MPa, it can deliver up to 1251 kgf.
Yes, the SAI125X325 is a genuine ISO 15552 profile cylinder. Its mounting dimensions, G1/2 port size, and 325 mm stroke adhere strictly to the standard, allowing it to be used as a drop-in replacement for any ISO 15552 cylinder in that size class.
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