Airtac SAI125 Standard Air Cylinder SAI125BX800
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX800 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 SAI125BX800
The AirTAC SAI125X800 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, it is tailored for moving substantial payloads across an 800 mm stroke. The extruded aluminum barrel omits tie-rods, providing a sleek profile that integrates seamlessly into modern machinery.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads, and because no magnet is specified, it operates without integrated sensor detection. The adjustable air cushions at both ends are essential for decelerating the large 125 mm piston over the long 800 mm travel distance.
Airtac SAI125 Standard Air Cylinder SAI125BX800 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX800 |
|---|---|
| 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 SAI125BX800
| 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 SAI125BX800 Is Used
Heavy Material Handling
Ideal for driving large gantry lifts or heavy pallet transfer carts where a 6136 N push force at 0.5 MPa is necessary to shift substantial weights across an 800 mm span.
Automotive Assembly Presses
Provides the long, powerful linear motion required for positioning heavy chassis components or actuating sub-assembly jigs in vehicle manufacturing lines.
Large Packaging Machinery
Executes the 800 mm stroke needed to actuate massive folding flaps or heavy-duty sealing heads on industrial bulk-packaging equipment.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX800 the Right Cylinder?
Providing 6136 N at 0.5 MPa, this 125 mm bore is a powerhouse; if your application requires less force, stepping down to the 100 mm bore yields 3927 N, while scaling up to the 160 mm bore provides 10053 N. For an 800 mm stroke, side loading is a critical concern. The extended, unsupported rod is highly susceptible to bending under lateral loads, so you must use an external guide rail or a dedicated guided cylinder to prevent premature rod-bearing wear.
This model is a dimensionally interchangeable drop-in replacement for any standard ISO 15552 cylinder. To match this exact unit, specify the 125 mm bore, 800 mm stroke, PT port thread, and your preferred mounting accessory (such as an LB foot or TC trunnion). Note that because no -S magnet is specified, position sensing via CMSE or DMSE switches is not enabled. Additionally, the standard adjustable air cushion only decelerates the piston near stroke end; it does not hold the load. If your process requires position holding without live air pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) 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 SAI125BX800 FAQ
At an operating pressure of 0.5 MPa, the 125 mm bore generates 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X800 is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 standard cylinders. Just verify your port, mounting, and rod material requirements.
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