Airtac SAI125 Standard Air Cylinder SAI125AX450S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX450S 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 SAI125AX450S
The AirTAC SAI125X450-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, extending across a 450 mm stroke to handle substantial loads. The extruded aluminum barrel eliminates tie-rods, creating a clean profile that drops directly into standardized ISO 15552 mounting footprints.
Equipped with a magnet for position sensing, this unit works seamlessly with CMSE and DMSE switches seated in the dual side grooves. It features a SUS420J2 stainless steel piston rod for superior corrosion resistance and utilizes PT tapered port threads to ensure a reliable pneumatic seal.
Airtac SAI125 Standard Air Cylinder SAI125AX450S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX450S |
|---|---|
| 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 SAI125AX450S
| 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 SAI125AX450S Is Used
Heavy Stamping
Drives large press dies and stamping assemblies where high impact energy and a 450 mm extension are required to form thick metal components.
Automotive Assembly
Actuates heavy chassis positioning rigs and robotic welding fixtures, utilizing the integrated magnet to trigger CMSE sensors for precise mid-stroke positioning.
Pallet Diversion
Pushes fully loaded pallets off high-throughput conveyor lines, relying on the 6136 N pull force at 0.5 MPa to overcome significant sliding friction.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX450S the Right Cylinder?
Select this 125 mm bore when an 80 mm cylinder lacks thrust; the 80 bore yields 2513 N at 0.5 MPa, whereas this model reaches 6136 N. If your application requires less force, stepping down to a 100 mm bore provides 3927 N at 0.5 MPa. The 450 mm stroke demands careful mechanical design, as long unsupported rods are susceptible to bending under side loads; integrating an external guide rail or utilizing a guided cylinder module will prevent premature rod-bearing wear.
For interchangeability, match the 125 mm bore, 450 mm stroke, G1/2 port, and appropriate mounting accessory like an FA flange or TC trunnion. Note that standard air cushions only decelerate the piston at stroke ends and do not function as a braking mechanism; if the system must hold a load during a complete loss of air pressure, specify an external pilot-operated check valve or select the SAIL locking variant.
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 SAI125AX450S FAQ
At 0.5 MPa, this cylinder provides 6136 N of push force and 5734 N of pull force. If operating pressure increases to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X450-S is dimensionally interchangeable with other ISO 15552 profile cylinders. Ensure your existing setup matches the 125 mm bore, 450 mm stroke, and G1/2 port configuration for a seamless drop-in replacement.
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