Airtac SAI125 Standard Air Cylinder SAI125X280S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X280S 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 SAI125X280S
The AirTAC SAI125X280-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N and a pull force of 5734 N at 0.5 MPa, this 125mm bore unit is built to drive substantial loads through its 280mm stroke. The extruded aluminum barrel design omits tie rods, providing a smooth exterior that resists contamination.
This specific configuration includes a standard carbon steel piston rod and a built-in magnet (-S) for position sensing. The dual sensor grooves on the barrel accept CMSE or DMSE reed switches seamlessly. For environments requiring higher heat resistance, the standard TPU seals can be swapped for Viton (H) options, while the SAIL variant offers an air-released lock for secure load holding.
Airtac SAI125 Standard Air Cylinder SAI125X280S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X280S |
|---|---|
| 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 SAI125X280S
| 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 SAI125X280S Is Used
Heavy Metal Stamping
Provides the robust 6136 N thrust required to actuate large mechanical stamping presses and form thick-gauge metal components.
Pallet Diversion
Generates enough force to smoothly index and divert fully loaded heavy-duty pallets along high-throughput material handling lines.
Automotive Component Testing
Applies consistent, repeatable pressure cycles for fatigue testing structural automotive sub-assemblies and suspension parts.
Is the Airtac SAI125 Standard Air Cylinder SAI125X280S the Right Cylinder?
Selecting this 125mm bore is appropriate when 100mm bore cylinders (offering 3927 N push at 0.5 MPa) lack the necessary thrust, but a 160mm bore (10053 N at 0.5 MPa) would be excessive overkill. The 280mm stroke is well within the 1500mm maximum standard stroke for this bore size. Operating speed ranges from 30-500 mm/s.
Because the stroke is 280mm, it approaches the threshold where side loads can induce rod-bearing bending. Utilizing an external guide rail or a guided cylinder module is recommended to prevent premature wear. Note that a standard SAI does not hold its position when air pressure is exhausted; for dead-load holding without live pressure, specify the SAIL lock or BSAI clamp-lock variant. This PT-ported (G1/2) profile cylinder serves as a dimensionally interchangeable drop-in replacement per ISO 15552 mounting interfaces.
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 SAI125X280S FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.9 MPa, the push force reaches 11045 N.
Yes, the SAI125X280-S is a true ISO 15552 profile cylinder. Its standardized mounting dimensions and G1/2 PT ports make it dimensionally interchangeable with other ISO 15552 cylinders, serving as a direct drop-in replacement.
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