Airtac SAI125 Standard Air Cylinder SAI125AX300S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX300S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX300S
The AirTAC SAI125X300-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. Its 300 mm stroke provides the extended travel necessary for large-format material handling and heavy payload manipulation.
This specific configuration features an SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid or washdown environments. Equipped with a magnetic piston (-S), the extruded aluminum barrel includes sensor grooves on both sides for seamless direct mounting of CMSE or DMSE reed switches.
Airtac SAI125 Standard Air Cylinder SAI125AX300S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX300S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 SAI125AX300S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SAI125AX300S Is Used
Heavy Stamping Presses
Generates the high clamping force needed to hold large metal panels securely during heavy industrial stamping operations.
Pallet Diverters
Handles extended 300 mm travel to push heavy loaded pallets smoothly across transfer lines without mechanical binding.
Large Mold Ejection
Provides reliable ejection force for oversized injection molds, utilizing the full 8590 N thrust available at 0.7 MPa.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX300S the Right Cylinder?
Selecting this 125 mm bore model makes sense when 80 mm cylinders (providing 2513 N at 0.5 MPa) cannot generate sufficient thrust, but a 160 mm bore (10053 N at 0.5 MPa) would be physically oversized. The PT tapered port thread matches standard pneumatic infrastructure, and the ISO 15552 mounting interface allows direct drop-in replacement for other compliant profile cylinders.
Because the 300 mm stroke creates an extended lever arm, side loads will exert significant bending stress on the rod bearing. To prevent premature seal wear and rod deformation, guide the load externally using linear rails or select a guided cylinder. Note that the adjustable air cushions only decelerate the piston near end-of-stroke; they do not hold a load if air pressure drops. For position holding without live pressure, integrate the SAIL lock variant or an external rod lock.
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 SAI125AX300S FAQ
This 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 SAI125X300-S is dimensionally interchangeable per ISO 15552, meaning it shares standard mounting interfaces and can serve as a drop-in replacement for other ISO 15552 profile cylinders.
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