Airtac SAI125 Standard Air Cylinder SAI125BX5
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX5 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 5mm 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
- Stroke5 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX5
The AirTAC SAI125X5 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a substantial push force of 6136 N and pull force of 5734 N at 0.5 MPa. Despite its highly compact 5 mm stroke, this made-to-order actuator utilizes a robust 32 mm piston rod to handle high-impact clamping and holding tasks. The extruded aluminum barrel design strictly adheres to ISO 15552 mounting dimensions, ensuring seamless interchangeability with other standard profile cylinders.
This specific configuration features a SUS304 stainless steel rod (option B), providing exceptional corrosion resistance for harsh or washdown environments. The standard TPU elastomer seals handle operating temperatures from -20 to +70 C, while the integrated adjustable air cushions at both ends manage kinetic energy during rapid movements.
Airtac SAI125 Standard Air Cylinder SAI125BX5 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX5 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 5 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 SAI125BX5
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×5 | 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 SAI125BX5 Is Used
Heavy-Duty Spot Clamping
Ideal for securing large steel castings during CNC machining, using the 5 mm stroke to lock components rapidly with 6136 N of force.
Pallet Stopping Arms
Functions as a heavy-duty stopper block on conveyor lines, extending briefly to halt heavy pallets without requiring long rod travel.
High-Force Ejection
Delivers rapid, localized ejection of dense manufactured parts from press dies, utilizing the 125 mm bore's massive immediate thrust.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX5 the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant provides a significant leap in power, upgrading from 3927 N to 6136 N push force at 0.5 MPa. Because this model features a non-standard 5 mm stroke, it is specifically manufactured for short-duration, high-force ejection or clamping. For applications requiring positive load holding during air pressure loss, the standard SAI will drift; consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. To ensure proper fitment, confirm your system uses a PT tapered G1/2 port and standard ISO 15552 mounting accessories.
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 SAI125BX5 FAQ
At 0.5 MPa, 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, it is dimensionally interchangeable per ISO 15552. You can drop it in to replace other ISO 15552 profile cylinders using standard mounting accessories, matching the G1/2 port and 125 mm bore spacing.
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