Airtac SAI125 Standard Air Cylinder SAI125X750S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X750S 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 SAI125X750S
The AirTAC SAI125X750-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty positioning. It generates 6136 N of push force at 0.5 MPa, scaling up to 8590 N at 0.7 MPa. The 750 mm stroke provides the extended travel needed for large-scale automation, while the integrated magnet enables direct mounting of CMSE and DMSE reed switches along the dual sensor grooves.
Configured with a standard carbon steel piston rod and PT tapered port threads, this extruded aluminum barrel design omits tie-rods for a clean exterior. It is a genuine AirTAC component built to deliver dimensional interchangeability with other ISO 15552 actuators on the market.
Airtac SAI125 Standard Air Cylinder SAI125X750S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X750S |
|---|---|
| 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 SAI125X750S
| 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 SAI125X750S Is Used
Heavy Stamping
Provides the robust linear force required to actuate large mechanical presses and heavy-gauge metal forming assemblies.
Automotive Body Assembly
Drives large welding fixtures and positioning gates along the 750 mm travel, utilizing the integrated magnet for end-of-stroke confirmation.
Pallet Transfer
Indexes heavy-loaded pallets across automated conveyor lines, relying on the 40 mm adjustable cushioning to stop massive loads smoothly.
Is the Airtac SAI125 Standard Air Cylinder SAI125X750S the Right Cylinder?
This 125 mm bore fits applications requiring roughly 6000 N of force at 0.5 MPa; stepping down to a 100 mm bore yields 3927 N, while the larger 160 mm bore offers 10053 N. The 750 mm stroke falls within the standard limit for this bore, but the extended length requires careful mechanical planning. Long, unsupported rods are highly susceptible to bending under side loads, so utilizing an external guide rail or a fully guided cylinder is strongly recommended to prevent premature rod-bearing wear.
Because this is a standard double-acting cylinder, it cannot hold a load if air pressure is lost or the control valve is centered. If your application requires fail-safe position holding, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. To match this unit, specify the G1/2 port, M27x2 rod thread, and an appropriate ISO 15552 mounting accessory such as a TC trunnion or CA clevis.
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 SAI125X750S FAQ
This 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X750-S is dimensionally interchangeable per ISO 15552. Its mounting interface and envelope dimensions allow it to drop in as a replacement for other standard ISO 15552 profile cylinders.
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