Airtac SAI125 Standard Air Cylinder SAI125BX500S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX500S 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 SAI125BX500S
The AirTAC SAI125X500-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N at 0.5 MPa, making it well-suited for moving substantial masses over its 500 mm stroke. The extruded aluminum barrel omits tie-rods, providing a clean exterior that resists contamination.
This specific configuration includes a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in harsh or washdown environments. It is equipped with a magnet (-S) for position sensing via CMSE or DMSE switches, which seat neatly into the dual sensor grooves molded into the barrel profile. The PT tapered air ports are tapped to G1/2.
Airtac SAI125 Standard Air Cylinder SAI125BX500S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX500S |
|---|---|
| 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 SAI125BX500S
| 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 SAI125BX500S Is Used
Heavy Stamping
Provides the 6136 N push force at 0.5 MPa required to form thick metal sheets and actuate large mechanical presses over a 500 mm travel.
Pallet Handling
Moves fully loaded heavy pallets along transfer lines, utilizing the integrated magnet and CMSE sensors to confirm end-of-stroke positioning.
Automated Welding
Positions large automotive sub-assemblies into robotic welding cells, relying on the SUS304 rod to withstand weld spatter and shop-floor grit.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX500S the Right Cylinder?
With a 500 mm stroke, this 125 mm bore cylinder generates high thrust but requires careful mounting to prevent rod-bearing bending under side loads. For strokes of 300 mm or more, always use an external guide rail or a dedicated guided cylinder to absorb lateral forces and prevent premature seal wear.
If your application requires less force, stepping down to the 100 mm bore model reduces the 0.5 MPa push force to 3927 N. This SAI125X500-S is dimensionally interchangeable per ISO 15552, featuring a 125 mm bore, 500 mm stroke, G1/2 PT ports, and standard mounting accessories like FA flanges or TC trunnions. Note that the adjustable air cushions only decelerate the piston; they do not hold a load. For dead-load holding without air pressure, specify the SAIL or BSAI variant.
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 SAI125BX500S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X500-S is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other standard ISO 15552 cylinders. You can swap it directly using the existing FA, FB, or TC mounting accessories.
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