Airtac SAI125 Standard Air Cylinder SAI125AX75S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX75S
The AirTAC SAI125X75-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at just 0.5 MPa, this 125 mm bore model is built to move substantial masses. The 75 mm stroke provides a compact extension for high-force clamping or pressing tasks.
This variant includes an integrated magnet (-S) for use with CMSE and DMSE series reed switches, fitting neatly into the extruded aluminum barrel's dual sensor grooves. As configured here, the piston rod is crafted from SUS420J2 stainless steel (option A) for superior corrosion resistance, and ports feature a PT tapered thread design.
Airtac SAI125 Standard Air Cylinder SAI125AX75S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAI125AX75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAI125AX75S Is Used
Heavy-Duty Stamping
Provides the high 6136 N force needed to form, mark, or stamp thick metal components in automated press lines.
Injection Molding Eject
Delivers reliable ejection force to free large molded parts from heavy industrial tooling molds.
Pallet Diversion
Actuates heavy-duty diverter arms to route loaded pallets across high-throughput material handling conveyors.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX75S the Right Cylinder?
Choose this 125 mm bore when 100 mm (offering 3927 N at 0.5 MPa) is insufficient to overcome your process friction or payload. If the 6136 N output is excessive and space is tight, stepping down to an 80 mm bore (2513 N at 0.5 MPa) saves weight and air consumption. Because this is a 75 mm stroke, side-load stress on the rod bearing is minimal compared to longer extensions.
For drop-in compatibility, this cylinder matches the ISO 15552 mounting interface dimensions exactly. Replacement or upgrade planning requires matching the 125 mm bore, 75 mm stroke, G1/2 port, and your chosen mounting accessory (like TC trunnion or FA flange). Note that the standard SAI relies on adjustable air cushions to decelerate the piston; it cannot hold a load vertically if air pressure is lost. For dead-load holding, specify the SAIL pneumatic lock variant or use an external rod lock.
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 SAI125AX75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI series is dimensionally interchangeable per ISO 15552 standards. You can replace other ISO 15552 profile cylinders by matching the 125 mm bore, 75 mm stroke, and mounting interface, though you should verify PT port and SUS420J2 rod specifications.
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