Airtac SAI125 Standard Air Cylinder SAI125AX145S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX145S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX145S
The AirTAC SAI125X145-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit is built to execute demanding press and lift cycles. The 145 mm stroke provides exact travel for high-tonnage clamping tasks. Equipped with a -S magnet, the barrel integrates seamlessly with CMSE and DMSE reed switches for precise end-of-stroke detection.
This model features a SUS420J2 stainless steel piston rod (material code A), offering superior corrosion resistance compared to standard carbon steel. The extruded aluminum profile barrel incorporates sensor grooves on both sides for flexible switch mounting. Adjustable air cushions at both ends manage the kinetic energy of moving loads, while the PT tapered port threads ensure a reliable, leak-free pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX145S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX145S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAI125AX145S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAI125AX145S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required to form and stamp thick metal components in automated fabrication lines.
Pallet Stopping
Acts as a high-force stopper for heavy pallets on roller conveyors, using the 145 mm stroke to absorb impact and halt loads securely.
Injection Molding Extraction
Utilizes the SUS420J2 stainless steel rod to safely extract heavy molded parts from machinery, resisting residual heat and shop floor moisture.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX145S the Right Cylinder?
Select this 125 mm bore cylinder when an 80 mm bore (2513 N at 0.5 MPa) cannot generate the required force, or step down from a 160 mm bore (10053 N) if you need to optimize air consumption and footprint. The 145 mm stroke is well below the 1500 mm maximum, keeping the rod bearing stress minimal without requiring external guides.
Because this is a standard double-acting cylinder, it does not hold a load if air pressure is removed; the piston will drift. For fail-safe load holding, use the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock. To mount this ISO 15552 profile cylinder, pair it with CA or CB clevis brackets, and ensure you order the -S magnet option for your CMSE/DMSE sensor setup.
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 SAI125AX145S 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 SAI125X145-S is dimensionally interchangeable per ISO 15552, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders using the same mounting interface and PT G1/2 port.
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