Airtac SAI125 Standard Air Cylinder SAI125AX750S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX750S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX750S
The AirTAC SAI125X750-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa and 8590 N at 0.7 MPa, this 125 mm bore unit is built to move substantial masses across its 750 mm stroke. The extruded aluminum barrel omits tie-rods for a clean exterior while retaining standardized mounting dimensions.
This specific configuration includes a -S magnet for direct compatibility with CMSE and DMSE reed sensors, enabling reliable end-of-stroke detection. It also features an SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance over standard carbon steel. The PT tapered port threads ensure a tight, vibration-resistant pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX750S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX750S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 SAI125AX750S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAI125AX750S Is Used
Heavy Stamping Press
Provides the 8590 N push force at 0.7 MPa needed to actuate large mechanical presses and form heavy-gauge metal components.
Automotive Assembly Jigs
Drives large positioning fixtures and heavy clamping arms on automotive welding lines, utilizing the 750 mm stroke to clear robotic work zones.
Pallet Transfer Gates
Actuates heavy-duty diverter gates and lift-and-rotate stations handling fully loaded pallets in high-throughput distribution centers.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX750S the Right Cylinder?
Selecting this 125 mm bore is ideal when 100 mm cylinders (offering 5497 N push at 0.7 MPa) lack the thrust for your heaviest fixtures. If your application requires even greater power, stepping up to a 160 mm bore provides 14074 N at 0.7 MPa. With a 750 mm stroke, the unsupported rod is highly susceptible to bending under side loads; always pair this cylinder with an external guide rail or use a guided cylinder to prevent premature rod-bearing wear.
This unit serves as a direct drop-in replacement for any ISO 15552 profile cylinder with matching 125 mm bore, 750 mm stroke, G1/2 (PT) ports, and standard mounting accessories like FA flanges or TC trunnions. Because it is a standard double-acting cylinder, it cannot hold a load if air pressure drops; for vertical loads requiring fail-safe holding, consider the SAIL or BSAI locking variants.
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 SAI125AX750S FAQ
This 125 mm bore cylinder provides a theoretical push force of 6136 N at 0.5 MPa, 8590 N at 0.7 MPa, and 11045 N at 0.9 MPa. The pull force at 0.5 MPa is 5734 N.
Yes, the SAI125X750-S is a genuine ISO 15552 profile cylinder. It is dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke, provided your mounting interface and G1/2 (PT) ports match.
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