Airtac SAI125 Standard Air Cylinder SAI125X275S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X275S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X275S
The AirTAC SAI125X275-S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 275mm stroke. Because 275mm is not a standard factory stroke, it is produced as a non-standard made-to-order unit. It delivers a robust 6136N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This variant includes a built-in magnet for CMSE or DMSE sensor switches and uses standard carbon steel for the piston rod. It features tapered PT ports and adjustable air cushions at both ends to manage high kinetic energy safely.
Airtac SAI125 Standard Air Cylinder SAI125X275S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X275S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAI125X275S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SAI125X275S Is Used
Heavy Stamping
Provides the high thrust necessary for pressing bearings or forming heavy metal components in automated lines.
Pallet Diversion
Generates enough force to deflect fully loaded pallets along high-speed material handling conveyors.
Plastic Molding
Actuates large heavy-duty clamps and ejection mechanisms within injection molding machinery.
Is the Airtac SAI125 Standard Air Cylinder SAI125X275S the Right Cylinder?
If 6136N of push force at 0.5 MPa is more than your application requires, consider stepping down to the 100mm bore, which provides 3927N. For heavier loads, the 160mm bore offers 10053N. Because this is a 275mm stroke, be mindful of rod-bearing bending under side loads; utilizing a guided cylinder carriage or external load support is recommended.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders. To mount it, use standard accessories like TC trunnion or FA flange brackets, and pair it with CMSE/DMSE sensors via the -S magnet option. Note that this standard cylinder does not hold loads without live air pressure; if power drops, the piston will drift. For fail-safe holding, use the SAIL or BSAI variant.
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 SAI125X275S FAQ
At 0.5 MPa, this cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
Yes, the SAI series is dimensionally interchangeable per ISO 15552. It can serve as a drop-in replacement for other standard profile cylinders using standard mounting interfaces.
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