Airtac SAI125 Standard Air Cylinder SAI125BX90
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX90 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX90
The AirTAC SAI125X90 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, it provides the power needed for high-inertia operations. The 90 mm stroke offers precise short-travel movement within a compact overall footprint.
This configuration features a SUS304 stainless steel piston rod (material code B), making it highly suitable for environments where moisture or corrosion is a concern. The barrel utilizes an extruded aluminum profile with sensor grooves on both sides, allowing for direct mounting of CMSE or DMSE switches if a magnet is added later.
Airtac SAI125 Standard Air Cylinder SAI125BX90 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX90 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAI125BX90
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAI125BX90 Is Used
Heavy Stamping
Provides the high impact force needed for metal forming and heavy stamping presses.
Large Clamp Jigs
Secures large automotive or structural components firmly in place during machining operations.
Pallet Stops
Acts as a robust stopper mechanism for heavy pallets navigating high-throughput material lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX90 the Right Cylinder?
Selecting this 125 mm bore provides substantial thrust, stepping up from the 80 mm bore which yields 2513 N at 0.5 MPa. If an application requires less force, dropping to the 80 mm bore saves space and air consumption. The PT tapered G1/2 port matches the standard flow requirements for this bore size.
Because this is a standard double-acting cylinder, it relies on live air pressure to maintain its rod position. If your machine loses air, the piston will drift; for critical drop-prevention, consider the SAIL variant with an air-released lock or an external rod lock. Since the stroke is under 300 mm, rod-bearing bending is minimal, but side loads should still be minimized via external guides.
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 SAI125BX90 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force.
Yes, the SAI125X90 is dimensionally interchangeable per ISO 15552, meaning it shares identical mounting interfaces and can serve as a drop-in replacement for other standard ISO 15552 profile cylinders.
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