Airtac SAI125 Standard Air Cylinder SAI125X300S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X300S 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 SAI125X300S
The AirTAC SAI125X300-S is a double-acting ISO 15552 profile cylinder built for heavy-duty automation. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it highly capable for moving substantial payloads. The 300 mm stroke provides the extended travel distance required for large indexing, pressing, or material handling tasks.
This variant includes a magnetic piston (-S) that works seamlessly with CMSE and DMSE reed switches. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. Standard carbon steel piston rod construction offers robust durability, and the integrated adjustable air cushions at both ends absorb kinetic energy to protect your machinery.
Airtac SAI125 Standard Air Cylinder SAI125X300S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X300S |
|---|---|
| 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 SAI125X300S
| 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 SAI125X300S Is Used
Heavy-Duty Pressing
Provides the 6136 N of force at 0.5 MPa needed for stamping, riveting, and assembling dense components in automated manufacturing lines.
Pallet Indexing
The 300 mm stroke easily pushes heavy pallets or workpieces between machining stations, utilizing adjustable cushions to stop massive loads smoothly.
Large Gate Actuation
Ideal for opening and closing heavy industrial doors or material flow gates where substantial reach and high pulling force are required.
Is the Airtac SAI125 Standard Air Cylinder SAI125X300S the Right Cylinder?
This 125 mm bore generates 6136 N of thrust at 0.5 MPa; if your application requires less force, stepping down to an 80 mm bore yields 2513 N, while a 160 mm bore offers 10053 N for heavier loads. The PT (tapered) port thread is G1/2 for this size.
Because this model features a 300 mm stroke, the extended rod is susceptible to bending under side loads. We recommend using an external guide rail or a fully guided cylinder to prevent premature rod-bearing wear. Furthermore, this cylinder relies on live air pressure to maintain its position; if air is lost, the piston will drift. For fail-safe load holding, 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 SAI125X300S FAQ
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X300-S is dimensionally interchangeable with other ISO 15552 profile cylinders. You can drop it into existing foot (LB) or flange (FA) mounts without modifying the assembly.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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