Airtac SAI125 Standard Air Cylinder SAI125BX210S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX210S 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 SAI125BX210S
The AirTAC SAI125X210-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit is built to move substantial loads. The 210 mm stroke provides the extended travel needed for large clamping, pressing, and lifting operations.
This configuration features a SUS304 stainless steel rod (material code B) for superior corrosion resistance in harsh environments. Equipped with a magnet (-S), it integrates seamlessly with CMSE and DMSE sensor switches housed in the dual-side grooves of the extruded aluminum barrel. It also includes adjustable air cushions at both ends to absorb impact.
Airtac SAI125 Standard Air Cylinder SAI125BX210S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX210S |
|---|---|
| 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 SAI125BX210S
| 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 SAI125BX210S Is Used
Heavy-Duty Stamping
Provides the 6136 N thrust at 0.5 MPa required to form and stamp thick metal components in automated fabrication lines.
Injection Mold Clamping
Uses the 210 mm stroke to secure large injection molds, relying on the SUS304 rod for durability in humid production environments.
Pallet Lifting
Lifts heavy loaded pallets in packaging zones, utilizing adjustable air cushions to prevent end-of-stroke shock.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX210S the Right Cylinder?
Select this 125 mm bore cylinder when 80 mm bore units (providing 2513 N at 0.5 MPa) lack the thrust for your heavy machinery, but you want to avoid the mass of a 160 mm unit. Because this 210 mm stroke exceeds the 300 mm threshold where side-load risks increase, it remains manageable but still requires checking rod-bearing loads. For applications demanding precise linear guidance without side-load friction, pair this cylinder with an external guide rail or use a guided cylinder.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders. To match an existing setup, specify the PT port thread, 125 mm bore, 210 mm stroke, and your required mounting accessory (such as LB foot or TC trunnion). If the system must hold a load vertically when air pressure is removed, note that the standard air cushion only decelerates the piston and does not lock it; you must use an external pilot-operated check valve or the SAIL locking 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 SAI125BX210S FAQ
At 0.5 MPa operating pressure, this 125 mm bore 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 true ISO 15552 profile cylinder. Its standardized mounting dimensions make it interchangeable with other ISO 15552 cylinders, provided you match the 125 mm bore, 210 mm stroke, and mounting accessories.
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