Airtac SAI125 Standard Air Cylinder SAI125BX375
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX375 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX375
The AirTAC SAI125X375 is a double-acting ISO 15552 profile cylinder offering 6136 N of push force at 0.5 MPa. Its 375 mm stroke handles substantial linear actuation tasks requiring significant displacement. The extruded aluminum barrel omits tie-rods, presenting a clean exterior that is dimensionally interchangeable per ISO 15552 standards.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads and lacks a magnet. For operations needing position holding without live air pressure, the SAIL variant with an air-released lock is recommended over relying on the standard adjustable air cushions, which only decelerate the piston near stroke ends.
Airtac SAI125 Standard Air Cylinder SAI125BX375 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX375 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAI125BX375
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAI125BX375 Is Used
Heavy Stamping
Provides the robust 6136 N push force at 0.5 MPa needed to actuate heavy-duty stamping and forming presses over a 375 mm travel distance.
Large Mold Handling
Shifts substantial molds or industrial tooling across factory floors, utilizing the 375 mm stroke to clear large machine envelopes safely.
Bulk Material Diversion
Pivels heavy diverter arms on bulk material conveyor lines, where the 125 mm bore delivers the necessary torque to redirect heavy product flows.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX375 the Right Cylinder?
Selecting this 125 mm bore makes sense when the 80 mm bore's 2513 N push force at 0.5 MPa is insufficient, but you want to avoid jumping to the massive 160 mm frame. The 375 mm stroke requires careful mounting to prevent rod-bearing bending under side loads. For strokes of 300 mm or more, always use an external guide rail or a guided cylinder carriage to prevent the unsupported rod from deflecting and damaging the front bearing.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 cylinders. To match this exact configuration, specify a 125 mm bore, 375 mm stroke, PT G1/2 port, foot or flange mounting accessory, and no magnet (-S omitted). Remember that standard air cushions only decelerate movement; they do not lock the load vertically if air pressure is lost.
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 SAI125BX375 FAQ
At an operating pressure of 0.5 MPa, the SAI125X375 cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X375 is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 cylinders. Ensure your setup matches the PT G1/2 port and 375 mm stroke specifications.
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