Airtac SAI125 Standard Air Cylinder SAI125BX65S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX65S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX65S
The AirTAC SAI125X65-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a substantial push force of 6136 N at 0.5 MPa, this 125mm bore actuator is built to manage high-load tasks. The 65mm stroke provides short, powerful linear movement for clamping or pressing. Its extruded aluminum barrel design omits tie rods, resulting in a compact footprint while maintaining strict ISO mounting interchangeability.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. Equipped with a magnet (-S), it seamlessly integrates with CMSE and DMSE reed switches via the dual sensor grooves on the barrel. The fluid porting uses PT tapered threads, and the standard TPU seals handle operating pressures up to 1.0 MPa.
Airtac SAI125 Standard Air Cylinder SAI125BX65S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX65S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAI125BX65S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAI125BX65S Is Used
Heavy-Duty Stamping
Provides the 6136N force required to deform or mark thick metal components in automated fabrication lines.
Pallet Diverting
Uses the short 65mm stroke to rapidly push heavy pallets onto branching conveyor lanes in material handling.
Injection Molding Extraction
Leverages the SUS304 rod and robust thrust to pull dense molded parts out of machinery, resisting high ambient heat.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX65S the Right Cylinder?
Selecting this 125mm bore actuator makes sense when 80mm bore cylinders (providing 2513 N at 0.5 MPa) lack the necessary thrust for heavy lifting or holding. If 6136 N is excessive for your application and you need finer control, stepping down to a 100mm bore (3927 N at 0.5 MPa) might be more efficient. Because this is a standard 65mm stroke, side-load stress on the rod bearing is minimal, but always ensure the load is axially aligned to prevent premature seal wear.
As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a direct drop-in replacement for other ISO 15552 cylinders. To complete your setup, match the 125mm bore, 65mm stroke, G1/2 port, and PT thread type with appropriate FA or FB flange accessories. The integrated magnet allows for precise end-of-stroke position sensing. Note that the standard adjustable air cushions only decelerate the piston; they do not lock the load. If your application requires dead-stop holding without continuous air pressure, consider the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder.
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 SAI125BX65S FAQ
At a standard operating pressure of 0.5 MPa, this 125mm bore cylinder generates 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the -S suffix indicates a built-in magnet, allowing direct mounting of CMSE or DMSE switches in the barrel grooves. Furthermore, it is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 standard actuators.
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