Airtac SAI125 Standard Air Cylinder SAI125X280
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X280 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X280
The AirTAC SAI125X280 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, it is tailored for moving substantial masses through a 280 mm stroke. The extruded aluminum barrel design omits tie rods, presenting a clean exterior that matches standardized ISO 15552 mounting interfaces.
This specific configuration features a carbon steel piston rod for high tensile strength under heavy loads. Because a magnet is not specified, this unit lacks integrated sensor grooves for CMSE or DMSE switches; machine builders requiring position feedback should select the -S variant. The standard TPU seals handle typical industrial temperatures, while the adjustable air cushions at both ends decelerate the large 125 mm piston smoothly.
Airtac SAI125 Standard Air Cylinder SAI125X280 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X280 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 280 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 SAI125X280
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×280 | 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 SAI125X280 Is Used
Heavy Stamping Presses
Generates the 6136 N of push force at 0.5 MPa required to actuate large mechanical stamping presses and heavy metal forming dies.
Automotive Assembly Jigs
Drives heavy structural clamping jigs on automotive welding lines, utilizing the 280 mm stroke to accommodate varying chassis widths.
Pallet Handling Systems
Shifts loaded pallets or heavy product totes across conveyor transfer stations where high kinetic energy demands robust cushioning.
Is the Airtac SAI125 Standard Air Cylinder SAI125X280 the Right Cylinder?
With a 125 mm bore, this cylinder sits in a heavy force class. If your application requires less energy, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa, whereas upgrading to a 160 mm bore provides 10053 N for extreme lifting. The 280 mm stroke falls within the 1500 mm standard maximum, making it a stocked, non-custom length.
Because the stroke is 280 mm, side loads can exert leverage on the rod bearing, potentially causing premature wear if the load is not guided. Engineers should utilize external linear guides or a guided cylinder carriage to absorb lateral forces. Furthermore, the SAI125X280 cannot hold a load vertically if air pressure drops; the air cushion only decelerates motion at stroke ends and acts as no brake. For fail-safe load holding without live pressure, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant. This model uses a PT G1/2 port and can be mounted via FA flange or TC trunnion accessories.
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 SAI125X280 FAQ
At 0.5 MPa operating pressure, the SAI125X280 generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X280 is dimensionally interchangeable per ISO 15552 and serves as a drop-in replacement for other ISO 15552 profile cylinders. It is not a tie-rod cylinder and uses a standard G1/2 port.
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