Airtac SAI125 Standard Air Cylinder SAI125AX800
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX800 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX800
The AirTAC SAI125X800 is a double-acting ISO 15552 profile cylinder featuring an 800 mm stroke and a 125 mm bore. It generates a push force of 6136 N at 0.5 MPa, scaling up to 8590 N at 0.7 MPa, making it well-suited for heavy-duty automation tasks.
This model is equipped with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and uses PT tapered port threads. Although the standard stroke extends to 800 mm, it operates at a controlled speed range of 30-500 mm/s to manage kinetic energy in large-scale setups.
Airtac SAI125 Standard Air Cylinder SAI125AX800 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX800 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAI125AX800
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAI125AX800 Is Used
Heavy Stamping
Drives large metal forming presses requiring substantial 6136 N push force at 0.5 MPa over an extended 800 mm travel distance.
Automated Assembly
Actuates heavy industrial platens and multi-stage assembly fixtures where a long 800 mm stroke is necessary for part clearance.
Material Handling
Shifts heavy palletized loads on automated conveyors, utilizing the 125 mm bore's high thrust capacity for reliable positioning.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX800 the Right Cylinder?
Selecting this 125 mm bore over the 100 mm version doubles your output force, stepping up from 3927 N to 6136 N at 0.5 MPa. If your application requires even less force, the 80 mm bore offers 2513 N. For this 800 mm stroke, side-load management is critical; long unsupported rods bend under lateral stress, so utilize an external guide rail or a dedicated guided cylinder to prevent rod-bearing damage.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard ISO 15552 unit with matching 125 mm bore, 800 mm stroke, and G1/2 port dimensions. Note that the standard SAI relies on live air pressure to hold position; if power drops, the load drifts. For fail-safe holding, specify the SAIL variant with an air-released lock or the BSAI clamp-lock version.
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 SAI125AX800 FAQ
At 0.5 MPa, the SAI125X800 delivers a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X800 is dimensionally interchangeable per ISO 15552. You can drop it into existing mounts designed for standard ISO 15552 125 mm bore cylinders with an 800 mm stroke.
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