Airtac SAI125 Standard Air Cylinder SAI125BX150S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX150S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX150S
The AirTAC SAI125X150-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N at 0.5 MPa and a pull force of 5734 N, making it well-suited for moving substantial loads over a 150 mm stroke. As a standardized profile barrel design, it offers a dimensionally interchangeable mounting interface for seamless integration into existing machinery.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It is equipped with a magnet (-S) for use with CMSE and DMSE sensor switches that mount directly into the dual grooves on the extruded aluminum barrel. The fluid port features a PT tapered thread, and the adjustable air cushions at both ends ensure smooth deceleration of large masses.
Airtac SAI125 Standard Air Cylinder SAI125BX150S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX150S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAI125BX150S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAI125BX150S Is Used
Heavy Stamping
Provides the high thrust necessary for actuating large stamping presses and forming dies, utilizing its 6136 N push force to shape heavy-gauge materials.
Automated Welding
Holds large automotive chassis components firmly in position during robotic welding cycles, with the SUS304 rod resisting weld spatter and shop floor contaminants.
Pallet Diverting
Drives heavy-duty diverter arms on high-capacity packaging lines to redirect loaded pallets, relying on adjustable air cushions to absorb kinetic energy at stroke end.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX150S the Right Cylinder?
Select this 125 mm bore model when your application requires significantly more thrust than a 100 mm bore can provide; at 0.5 MPa, the 100 mm bore yields 3927 N of push force, whereas this 125 mm bore delivers 6136 N. If your force requirements are lower, stepping down reduces air consumption and physical footprint. Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or exhausted; for applications requiring positive locking under zero pressure, consider the SAIL or BSAI variants.
To achieve a true drop-in replacement per ISO 15552, match the 125 mm bore, 150 mm stroke, PT G1/2 port, and your required mounting accessory—such as an LB foot or TC trunnion. Ensure you specify the -S magnet option if position feedback is needed.
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 SAI125BX150S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X150-S is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions and G1/2 port size make it a drop-in replacement for other ISO 15552 cylinders, provided you match the bore and stroke.
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