Airtac SAI125 Standard Air Cylinder SAI125BX475
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX475 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX475
The AirTAC SAI125X475 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. Its 475 mm stroke provides the extended travel required for large-scale material handling and press operations. Built with a tie-rod-less extruded aluminum barrel, it integrates seamlessly into standardized global mounting setups.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in humid or chemically exposed environments. It utilizes PT tapered port threads and operates without a magnet. For applications requiring end-position locking, the SAIL variant offers an integrated air-released lock, while the BSAI provides bidirectional clamp-locking.
Airtac SAI125 Standard Air Cylinder SAI125BX475 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX475 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAI125BX475
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAI125BX475 Is Used
Heavy-Duty Pressing
Provides 8590 N of thrust at 0.7 MPa, ideal for driving large assembly presses, metal forming, and industrial stamping operations.
Bulk Material Handling
The 475 mm stroke easily accommodates large actuation distances required for actuating heavy-duty diverter gates and bulk material sorters.
Automotive Component Fixturing
SUS304 rod material ensures reliable, corrosion-resistant operation when clamping large automotive subframes in wet or washdown environments.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX475 the Right Cylinder?
With a 475 mm stroke, this cylinder requires careful attention to side-load management; long unsupported rods are prone to bending under lateral forces, so utilizing an external guide rail or a guided cylinder body is essential to prevent premature rod-bearing wear. If your application needs less force, stepping down to the 100 bore yields 3927 N at 0.5 MPa, while upgrading to the 160 bore provides 10053 N for heavier loads. To match this unit, specify a 125 mm bore, 475 mm stroke, G1/2 port, PT threads, and compatible FA/FB flange or TC trunnion mounts. Note that standard air cushions only decelerate the piston near stroke ends; they do not hold loads. If air pressure drops, the rod will drift, so use an external pilot-operated check valve for position holding.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, serving as a direct drop-in replacement without requiring custom bracket fabrication.
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 SAI125BX475 FAQ
At 0.5 MPa, it provides 6136 N push force and 5734 N pull force. At 0.7 MPa, the push force increases to 8590 N. The operating speed range for this 125 mm bore is 30-500 mm/s.
Yes, the SAI is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 standard cylinders. It functions as a drop-in replacement for standardized setups.
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