Airtac SAI125 Standard Air Cylinder SAI125X210S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X210S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X210S
The AirTAC SAI125X210-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa. The 210 mm stroke is ideal for moving substantial masses through intermediate work cycles. A standard carbon steel piston rod handles high axial stress reliably.
Because this variant includes the -S magnet option, it integrates seamlessly with CMSE and DMSE reed switches. These sensors mount directly into the extruded aluminum barrel's dual side grooves for precise end-of-stroke detection. For environments requiring elevated temperatures, the standard TPU seals can be swapped for Viton (H) or NBR (N) alternatives.
Airtac SAI125 Standard Air Cylinder SAI125X210S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X210S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAI125X210S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAI125X210S Is Used
Heavy Stamping
Drives large press dies and forming tools where 6136 N of thrust at 0.5 MPa is required for metal deformation.
Pallet Diversion
Actuates heavy-duty lane diverters and alignment stops for fully loaded industrial pallets.
Injection Molding
Operates large mold core pulls and heavy clamping fixtures within automated plastic molding cells.
Is the Airtac SAI125 Standard Air Cylinder SAI125X210S the Right Cylinder?
Select this 125 mm bore when a 100 mm bore falls short, as the 100 mm only yields 3927 N of push force at 0.5 MPa. If your application requires even less thrust, stepping down to an 80 mm bore provides 2513 N. At 210 mm of travel, the stroke is moderate, but always ensure the load is guided to prevent rod-bearing bending. External guide rails parallel to the cylinder will absorb any lateral forces and extend seal life.
This model uses a PT tapered G1/2 port and an M27x2 rod thread. Being a true ISO 15552 profile cylinder, it serves as a drop-in dimensional replacement for other standard ISO 15552 actuators. Remember that standard air cushions only decelerate the piston at stroke ends; they do not hold a load if air pressure drops. For fail-safe locking, consider the SAIL or BSAI 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 SAI125X210S FAQ
At 0.5 MPa operating pressure, this cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes. The SAI125X210-S is a genuine ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 cylinders from various brands regarding mounting interfaces and footprint.
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