Airtac SAI125 Standard Air Cylinder SAI125BX75
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX75
The AirTAC SAI125X75 is a double-acting ISO 15552 profile cylinder delivering a substantial 6136 N push force at 0.5 MPa. Its 75 mm stroke provides rapid high-thrust actuation for heavy-duty machinery. The extruded aluminum barrel omits tie-rods, offering a clean exterior that matches standardized ISO mounting interfaces exactly.
This specific unit is configured with a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh washdown environments. It features PT G1/2 air ports and operates without a magnet. For applications requiring position holding without air pressure, consider the SAIL variant which integrates an air-released locking mechanism.
Airtac SAI125 Standard Air Cylinder SAI125BX75 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAI125BX75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAI125BX75 Is Used
Heavy Stamping
Provides 6136 N of thrust at 0.5 MPa for short-stroke metal forming and stamping press operations.
Pallet Diverting
Generates enough force to actuate heavy-duty pallet diverters and lane sorting gates in high-throughput logistics.
Injection Molding
Drives large mold core pulls and heavy ejector mechanisms where a compact 75 mm stroke is required.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX75 the Right Cylinder?
Select this 125 mm bore when 100 mm (3927 N at 0.5 MPa) is insufficient for your load, but you want to avoid the larger 160 mm frame. The 75 mm stroke is optimal for short, powerful clamping or lifting cycles. Because the stroke is under 300 mm, side-load stress on the rod bearing is minimal compared to longer strokes, though external guides are always recommended for heavy lateral loads.
This model uses a PT G1/2 port. It is dimensionally interchangeable per ISO 15552 with other standard profile cylinders. Mounting accessories include CA clevis or TC trunnion brackets depending on your pivot requirements. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold loads when air is exhausted.
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 SAI125BX75 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X75 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other standard ISO 15552 cylinders using the same mounting interface and G1/2 ports.
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