Airtac SAI125 Standard Air Cylinder SAI125BX900
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX900 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX900
The AirTAC SAI125X900 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty positioning. It yields 6136 N of push force and 5734 N of pull force at 0.5 MPa. The 900 mm stroke is optimal for moving substantial masses across extended linear distances on automated production lines.
Built with a SUS304 stainless steel rod (option B), this unit resists corrosion in humid or washdown environments. It lacks a piston magnet, so external reed or solid-state sensors like the CMSE series are not supported without factory modification.
Airtac SAI125 Standard Air Cylinder SAI125BX900 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX900 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAI125BX900
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAI125BX900 Is Used
Automotive Assembly
Transfers heavy chassis components along a 900 mm stroke with 6136 N of thrust at 0.5 MPa operating pressure.
Pallet Handling
Indexes loaded pallets through extended transfer stations where high mass requires a robust 125 mm bore.
Heavy Stamping
Actuates large press feeding mechanisms over long distances, utilizing adjustable air cushions to decelerate loads smoothly.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX900 the Right Cylinder?
Stepping down to the 100 mm bore drops the 0.5 MPa push force to 3927 N, which is insufficient for heavy 125 mm class loads. Conversely, upgrading to the 160 mm bore increases force to 10053 N for massive resistance. Because this stroke measures 900 mm, the extended rod is highly susceptible to bending under side loads; always pair this cylinder with an external linear guide or a guided carriage to prevent rod-bearing damage. If the machinery must retain a load during a pressure loss, note that the standard SAI drifts; specify the SAIL variant for pneumatic locking or the BSAI for bidirectional clamp-locking. This model uses PT tapered port threads, a G1/2 connection, and accepts FA or FB flange mounts for ISO 15552 interchangeability.
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 SAI125BX900 FAQ
At 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force.
No, the standard SAI does not hold position without live pressure. For secure load holding, use the SAIL pneumatic lock or BSAI clamp-lock variant.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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