Airtac SAI125 Standard Air Cylinder SAI125AX500S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX500S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX500S
The AirTAC SAI125X500-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a substantial 6136 N of push force at 0.5 MPa and features a robust 500 mm stroke. The extruded aluminum barrel design eliminates traditional tie rods, providing a sleek, durable structure that drops directly into ISO 15552 mounting interfaces.
This specific configuration includes an integrated magnet (-S) for seamless positioning feedback using CMSE or DMSE sensor switches. It is built with an SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance. The cylinder operates efficiently at speeds between 30 and 500 mm/s and utilizes PT tapered G1/2 ports for secure pneumatic connections.
Airtac SAI125 Standard Air Cylinder SAI125AX500S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX500S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAI125AX500S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAI125AX500S Is Used
Heavy Metal Stamping
Provides the 6136 N push force required to actuate large mechanical stamping presses and form thick metal components reliably.
Bulk Pallet Handling
Utilizes its 500 mm stroke and robust SUS420J2 rod to lift, index, and position heavily loaded pallets along high-throughput conveyor lines.
Automotive Component Assembly
Drives large jigs and clamping fixtures in automotive assembly, using CMSE sensors to verify proper component seating before robotic welding.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX500S the Right Cylinder?
Selecting this 125 mm bore model makes sense when applications require pushing or lifting heavy payloads that exceed the 3927 N capacity of a 100 mm bore at 0.5 MPa. If the 6136 N output is excessive for your process, stepping down to an 80 mm bore yields 2513 N, which might better suit lighter materials. The 500 mm stroke is standard, but at this length, side loads can cause severe rod-bearing bending. To mitigate premature wear, implement an external guide rail or select a fully guided cylinder to absorb lateral forces.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, making it an ideal drop-in replacement for upgrading existing setups. Keep in mind that the standard adjustable air cushions only decelerate the piston near the end of the stroke; they do not lock or hold the load. If your application requires position holding without continuous air pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) 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 SAI125AX500S FAQ
At a standard operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
No, the standard SAI cylinder does not hold position without live pressure. The adjustable air cushions only decelerate the piston at stroke ends. For fail-safe load holding, use the SAIL (with air-released lock) or BSAI (bidirectional clamp-lock) variants.
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