Airtac SAI125 Standard Air Cylinder SAI125X250S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X250S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X250S
The AirTAC SAI125X250-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 and 5734 N pull force, it handles substantial payloads with ease. The 250 mm stroke provides ample travel for large clamping, lifting, and pressing tasks.
This variant includes an integrated magnet for non-contact position sensing using CMSE or DMSE switches. The standard configuration utilizes a durable carbon steel piston rod and features a PT tapered port thread, ensuring a secure, leak-free pneumatic connection in demanding industrial environments.
Airtac SAI125 Standard Air Cylinder SAI125X250S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X250S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAI125X250S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SAI125X250S Is Used
Heavy-Duty Stamping
Provides the high thrust required for metal forming, punching, and heavy stamping operations up to 6136 N at 0.5 MPa.
Automotive Assembly
Ideal for positioning large chassis components or actuating heavy robotic welding fixtures with a 250 mm travel range.
Pallet Handling
Drives robust lifting and positioning mechanisms for heavy palletized goods in high-throughput logistics centers.
Is the Airtac SAI125 Standard Air Cylinder SAI125X250S the Right Cylinder?
Select this 125 mm bore model when 80 mm or 100 mm cylinders lack the necessary thrust, stepping up from the 100 mm bore's 3927 N push force to a commanding 6136 N at 0.5 MPa. Because the 250 mm stroke exceeds the 300 mm threshold where side-loading becomes a critical concern, ensure the load is guided externally to prevent rod-bearing bending and premature seal wear.
As an ISO 15552 profile cylinder, it serves as a drop-in replacement for any cylinder sharing that standard mounting interface. Note that the adjustable air cushions at both ends only decelerate the piston near stroke limits; they do not function as a brake. If your application requires the load to be held in place upon loss of air pressure, 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 SAI125X250S FAQ
At 0.5 MPa operating pressure, the SAI125X250-S 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 SAI125X250-S is dimensionally interchangeable with other ISO 15552 profile cylinders. It shares the standardized mounting interface and utilizes a G1/2 port, making it a drop-in replacement for matching bore sizes.
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