Airtac SAI125 Standard Air Cylinder SAI125BX105S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX105S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX105S
The AirTAC SAI125X105-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty positioning. It provides a robust push force of 6136 N at 0.5 MPa, making it well-suited for high-thrust clamping and pressing over its 105 mm stroke. As a standardized profile barrel design, it integrates seamlessly into existing ISO 15552 mounting setups without requiring custom brackets.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It is equipped with a magnet (-S) for direct compatibility with CMSE and DMSE sensor switches that mount directly into the dual side grooves of the extruded aluminum barrel. Fluid connections use PT tapered threads, and the cylinder features adjustable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAI125 Standard Air Cylinder SAI125BX105S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX105S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAI125BX105S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAI125BX105S Is Used
Heavy-Duty Stamping
Provides the necessary 6136 N push force at 0.5 MPa for deforming or stamping rigid materials in automated fabrication lines.
Injection Mold Clamping
Secures heavy injection molds with high clamping force, utilizing the SUS304 rod to resist moisture and coolant exposure.
Pallet Diverting
Drives robust diverting arms on high-mass pallet conveyors, relying on adjustable air cushions to absorb kinetic energy at stroke ends.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX105S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when your application demands substantial force that smaller bores cannot provide, such as upgrading from a 100 mm bore (which offers 3927 N push force at 0.5 MPa). If your system operates at higher pressures, this model can deliver up to 8590 N of push force at 0.7 MPa. The integrated magnet allows for precise end-of-stroke detection using DMSE or CMSE switches.
For applications requiring the load to remain stationary after air pressure is removed or exhausted, a standard SAI cylinder will experience piston drift. In such scenarios, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder to secure the load safely. To ensure a true drop-in replacement, verify the 125 mm bore, 105 mm stroke, PT port thread, and required mounting accessory type (such as TC trunnion or FA flange).
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 SAI125BX105S FAQ
This 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. If operating at 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X105-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders of the same bore and stroke, provided your port and mounting dimensions align.
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