Airtac SAI125 Standard Air Cylinder SAI125AX280
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX280 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 SAI125AX280
The AirTAC SAI125X280 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit is built to move substantial masses across its 280 mm stroke. The extruded aluminum barrel omits tie rods, providing a rigid yet streamlined profile that handles high-impact cycles with ease.
Configured here with an SUS420J2 stainless steel piston rod (material code A), it provides superior resistance against moisture and corrosion compared to standard carbon steel. This specific build utilizes PT tapered port threads and lacks a standard magnet. For operations requiring heat resistance beyond standard TPU seals, Viton (code H) options are available to handle elevated thermal loads.
Airtac SAI125 Standard Air Cylinder SAI125AX280 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX280 |
|---|---|
| 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 SAI125AX280
| 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 SAI125AX280 Is Used
Heavy Stamping
Provides the 6136 N thrust at 0.5 MPa needed to actuate large forming presses and heavy-duty stamping dies.
Injection Molding
Rugged 125 mm profile barrel handles core pulling and heavy ejector movements on large injection molding machines.
Pallet Handling
Drives robust lifting and positioning mechanisms for heavy loaded pallets in automated distribution centers.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX280 the Right Cylinder?
Select this 125 mm bore when 80 mm cylinders (providing 2513 N at 0.5 MPa) lack the thrust for your demanding payload, but you want to avoid the larger footprint of a 160 mm unit. Its 280 mm stroke requires careful mounting to prevent rod-bearing distortion under side loads. Always pair this cylinder with external guides or a guided carriage to absorb lateral forces and prevent premature wear.
This model serves as a direct drop-in replacement for other ISO 15552 profile cylinders, matching standardized mounting dimensions. Use PT threaded fittings for the G1/2 ports, and select appropriate FA or LB mounting accessories. Because it lacks a magnet, position sensing requires external switches. Note that standard adjustable air cushions only decelerate the piston at stroke ends; if your process demands fail-safe load holding upon air loss, specify the SAIL or BSAI locking variants.
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 SAI125AX280 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X280 is dimensionally interchangeable per ISO 15552. It matches standard mounting interfaces and G1/2 ports, allowing it to serve as a direct drop-in replacement for other ISO 15552 profile cylinders.
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