Airtac SAI125 Standard Air Cylinder SAI125AX270
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX270 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX270
The AirTAC SAI125X270 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust 6136 N push force and 5734 N pull force at 0.5 MPa, making it ideal for high-throputput pressing and clamping. The 270 mm stroke provides ample travel for large-scale material handling. This model features a SUS420J2 stainless steel piston rod (option A) for enhanced corrosion resistance in demanding environments.
Designed with an extruded aluminum barrel, this tie-rod-less cylinder integrates dual sensor grooves compatible with CMSE and DMSE switches. It utilizes PT tapered port threads and includes adjustable air cushions at both ends to absorb impact energy. Operating efficiently at speeds of 30-500 mm/s, it is a genuine AirTAC component built for rigorous industrial cycling.
Airtac SAI125 Standard Air Cylinder SAI125AX270 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX270 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAI125AX270
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAI125AX270 Is Used
Heavy-Duty Stamping
Provides the 6136 N force required to form and stamp thick metal components in automated fabrication lines.
Bulk Material Diversion
Actuates large heavy-duty diverter arms on conveyor systems handling dense aggregates or palletized goods.
Injection Mold Clamping
Secures large injection molds and heavy tooling with reliable, high-tonnage clamping throughout the production cycle.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX270 the Right Cylinder?
Select this 125 mm bore cylinder when applications require substantially more force than a 100 mm bore provides, stepping up from 3927 N to 6136 N at 0.5 MPa. If your application demands less force, a 100 mm bore might offer a lighter, faster solution. The 270 mm stroke falls within the standard 1500 mm maximum, but strokes of 300 mm or more require careful attention to side-load and rod-bearing bending; for longer extensions, utilize an external guide or a fully guided cylinder to prevent premature wear.
This model's PT port thread and standard ISO 15552 mounting interface ensure it functions as a drop-in replacement for other ISO 15552 cylinders. Pair it with TC trunnion or FA flange accessories based on your pivot or fixed mounting needs. Note that the standard SAI does not hold its position when air pressure is lost; for dead-load holding, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-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 SAI125AX270 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X270 is dimensionally interchangeable per ISO 15552. It serves as a drop-in replacement for other ISO 15552 profile cylinders, matching standard mounting and PT port dimensions.
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Standard models usually ship in 3-4 days.
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