Airtac SAI125 Standard Air Cylinder SAI125X400
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X400 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X400
The AirTAC SAI125X400 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and 400mm stroke. It generates 6136N of push force at 0.5MPa, making it well suited for moving heavy industrial payloads. The extruded aluminum barrel omits tie rods for a clean exterior.
This model incorporates a standard carbon steel piston rod and PT tapered port threads. Because no magnet is specified, it lacks integrated sensor tracks. For operations needing end-position locking, the SAIL variant provides a mechanical air-released lock.
Airtac SAI125 Standard Air Cylinder SAI125X400 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X400 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 400 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 SAI125X400
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×400 | 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 SAI125X400 Is Used
Heavy Stamping
Provides the robust 6136N push force at 0.5MPa required to actuate heavy stamping presses and form thick metal components.
Pallet Diversion
Handles large warehouse pallets by extending 400mm to push heavy loads onto secondary packaging or inspection conveyor lines.
Automotive Assembly
Moves heavy automotive chassis components along the line, utilizing the 125mm bore capacity for high-load lifting tasks.
Is the Airtac SAI125 Standard Air Cylinder SAI125X400 the Right Cylinder?
Selecting this 125mm bore is ideal when the 100mm bore maxes out at 3927N push force at 0.5MPa but you need substantially more thrust. With a 400mm stroke, the unsupported rod length is significant. You must manage side loads using external guide rails or a guided cylinder to prevent rod-bearing bending.
This unit uses G1/2 ports and operates at 30-500 mm/s. If the machinery loses air pressure, the piston will drift. Never rely on the adjustable air cushions to hold a load. Use an external pilot-operated check valve for position holding.
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 SAI125X400 FAQ
At 0.5MPa, the push force is 6136N and the pull force is 5734N. At 0.7MPa, the push force increases to 8590N.
Yes. It is dimensionally interchangeable per ISO 15552 standards, meaning it matches the mounting interface of other ISO 15552 profile cylinders.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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