Airtac SAI125 Standard Air Cylinder SAI125AX250
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX250 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 SAI125AX250
The AirTAC SAI125X250 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore unit paired with a 250 mm stroke is built to move substantial masses. Its extruded aluminum barrel omits tie rods, providing a clean exterior while maintaining strict dimensional interchangeability with other ISO 15552 cylinders.
This specific configuration features an SUS420J2 stainless steel rod (material code A) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads for a reliable, mechanical seal. Because no magnet is specified, it operates without external position sensing out of the box.
Airtac SAI125 Standard Air Cylinder SAI125AX250 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX250 |
|---|---|
| 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 SAI125AX250
| 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 SAI125AX250 Is Used
Automotive Stamping
Provides the high push force needed to actuate heavy stamping and forming dies on automotive assembly lines.
Plastic Injection Molding
Handles the robust extraction of large molded parts from heavy injection molds, utilizing the 250 mm stroke.
Pallet Handling
Lifts and positions heavy loaded pallets on conveyor systems where a 6136 N force output is required.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX250 the Right Cylinder?
Select this 125 mm bore when a smaller 100 mm bore (providing 3927 N at 0.5 MPa) cannot generate enough push force, but stepping up to a 160 mm bore (10053 N at 0.5 MPa) would be excessive. The 250 mm stroke provides ample travel for large clamping or lifting tasks. If your workflow demands intermediate stopping or failsafe load holding during air loss, the standard SAI cannot perform this; you must integrate an external rod lock or specify the SAIL (air-released lock) variant.
As a true ISO 15552 profile cylinder, this model serves as a drop-in replacement for any standard 125 mm bore, 250 mm stroke ISO 15552 cylinder. Ensure your setup accommodates the G1/2 port and pairs with appropriate mounting accessories like CA/CB clevis or TC trunnion brackets.
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 SAI125AX250 FAQ
At a standard 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. It is a genuine AirTAC profile cylinder built to strict ISO 15552 mounting dimensions, making it dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke. It is not a tie-rod design.
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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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