Airtac SAI125 Standard Air Cylinder SAI125X450S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X450S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X450S
The AirTAC SAI125X450-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore unit is built to drive substantial loads over its 450 mm stroke. The extruded aluminum barrel omits tie rods to provide a clean, integrated mounting interface that is dimensionally interchangeable with other ISO 15552 actuators.
This specific configuration includes a piston magnet (-S) for direct compatibility with CMSE and DMSE reed switches. The barrel features sensor grooves on both sides for flexible mounting, while the standard carbon steel rod and PT tapered port threads ensure robust, leak-free pneumatic connections in demanding industrial environments.
Airtac SAI125 Standard Air Cylinder SAI125X450S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X450S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAI125X450S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAI125X450S Is Used
Heavy Stamping Presses
Generates the high clamping force needed to secure heavy metal blanks during progressive stamping operations.
Pallet Diverters
Provides the extended reach and robust push force to redirect fully loaded pallets on high-throughput conveyor lines.
Large Assembly Jigs
Actuates heavy tooling plates and structural components within automotive and heavy equipment assembly jigs.
Is the Airtac SAI125 Standard Air Cylinder SAI125X450S the Right Cylinder?
Select this 125 mm bore when an 80 mm bore (providing 2513 N at 0.5 MPa) is insufficient for your load requirements, but a 160 mm bore (10053 N at 0.5 MPa) would be excessive overkill. The 450 mm stroke provides ample travel for material handling, but at this length the unsupported rod is highly susceptible to bending under side loads. To prevent premature seal wear and rod-bearing failure, guide the load externally using linear rails or employ a dedicated guided cylinder.
Because this is a standard double-acting cylinder, it cannot maintain a mid-stroke position or hold a load if air pressure is lost or the control valve is centered. If your machinery requires fail-safe drop protection, integrate the SAIL pneumatic lock variant or the BSAI bidirectional clamp-lock cylinder. For straightforward ISO 15552 mounting interchangeability, pair this unit with TC trunnion or FA flange accessories.
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 SAI125X450S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If your application requires the maximum theoretical force, it can reach up to 1251 kgf at 1.0 MPa.
Yes, the SAI125X450-S features a standard ISO 15552 profile barrel and mounting dimensions, making it dimensionally interchangeable with other ISO 15552 cylinders. You can use standard FA flanges or TC trunnions to match existing mounting footprints.
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