Airtac SAI125 Standard Air Cylinder SAI125AX290S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX290S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX290S
The AirTAC SAI125X290-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore unit is built to handle substantial loads across its 290 mm stroke. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that drops directly into standardized ISO 15552 mounting footprints.
This specific configuration includes a -S magnet for direct compatibility with CMSE and DMSE sensor switches, which seat neatly into the dual side grooves on the barrel. The piston rod is constructed from SUS420J2 stainless steel (material code A), offering excellent resistance to corrosion and moisture in demanding environments. Fluid ports feature PT tapered threading, and the cylinder integrates adjustable air cushions at both ends to decelerate the payload smoothly.
Airtac SAI125 Standard Air Cylinder SAI125AX290S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX290S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAI125AX290S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAI125AX290S Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate large pressing and stamping dies in metal fabrication lines.
Injection Molding Extraction
The SUS420J2 stainless rod withstands high heat and resin off-gassing when extracting heavy molded parts from injection machinery.
Pallet Handling
Ideal for lifting and positioning heavy pallets or product totes, utilizing the integrated magnet for precise end-of-stroke confirmation.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX290S the Right Cylinder?
Selecting this 125 mm bore is ideal when a 100 mm bore cylinder lacks sufficient thrust, as stepping up from a 100 mm bore (3927 N at 0.5 MPa) to this 125 mm size provides a significant jump to 6136 N at 0.5 MPa. Conversely, if your application only requires 2513 N at 0.5 MPa, dropping down to an 80 mm bore will save physical space and air consumption.
Because this model features a 290 mm stroke, the unsupported length of the piston rod during extension requires careful consideration. Side loads can cause rod-bearing bending and premature wear; utilizing an external guide rail or a fully guided cylinder is strongly recommended to keep the load perfectly aligned. Furthermore, standard double-acting cylinders drift when air pressure is removed, so if the machinery requires dead-load holding, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock instead of relying on the air cushion.
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 SAI125AX290S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X290-S is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 profile cylinders, matching the exact mounting interface and PT port locations.
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