Airtac SAI125 Standard Air Cylinder SAI125AX800S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX800S 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 SAI125AX800S
The AirTAC SAI125X800-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a substantial push force of 8590 N at 0.7 MPa, this 125mm bore actuator handles demanding industrial loads. The 800mm stroke provides the extended travel distance required for large-scale clamping, lifting, and press operations. As a genuine AirTAC component, it ensures reliable, long-life performance.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid or splash-prone environments. The -S suffix indicates a built-in magnet, allowing seamless integration with CMSE and DMSE sensor switches fitted into the dual-side extruded barrel grooves. Fluid and air connections utilize PT tapered port threads, ensuring tight, leak-free pneumatic connections under high dynamic loads.
Airtac SAI125 Standard Air Cylinder SAI125AX800S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX800S |
|---|---|
| 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 SAI125AX800S
| 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 SAI125AX800S Is Used
Heavy-Duty Stamping
Provides the 11045 N force at 0.9 MPa needed for forming and stamping thick metal components in automated fabrication lines.
Large Assembly Presses
Utilizes the 800mm stroke to actuate large-format jigs, pressing heavy bearings or machinery housings into precise alignment.
Pallet Diverting
Drives high-mass pallet sorting gates in logistics centers, where the 125mm bore delivers the thrust required to redirect heavy loads.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX800S the Right Cylinder?
Selecting this 125mm bore is ideal when an application requires upward of 8000 N of force, stepping up from the 80mm bore which provides 3518 N at 0.7 MPa. Because this model features an 800mm stroke, the unsupported rod length is significant; lateral side loads will cause rod-bearing bending and premature wear. To manage this, implement an external guide rail or utilize a fully guided cylinder to absorb radial forces.
This actuator is dimensionally interchangeable per ISO 15552, meaning it serves as a direct drop-in replacement for other ISO 15552 profile cylinders using identical bore, stroke, PT G1/2 ports, and mounting accessories. If the machinery must hold a load vertically without continuous air pressure, note that the standard adjustable air cushions at both ends only decelerate the piston and do not act as a lock; for fail-safe holding, specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant instead.
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 SAI125AX800S FAQ
At a standard operating pressure of 0.7 MPa, this 125mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N. At 0.9 MPa, the push force increases to 11045 N.
Yes, the SAI profile barrel is dimensionally interchangeable per ISO 15552. You can drop it directly into existing setups matching the 125mm bore, 800mm stroke, G1/2 port, and standard mounting accessories without modifying the machine frame.
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