Airtac SAI125 Standard Air Cylinder SAI125AX950S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX950S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX950S
The AirTAC SAI125X950-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a substantial push force of 8590 N at 0.7 MPa across its 950 mm stroke. The extruded aluminum barrel omits tie rods, presenting a clean exterior that matches standardized ISO 15552 mounting dimensions for straightforward machine integration.
Configured with a -S magnet, this unit directly accepts CMSE and DMSE sensor switches along the dual side grooves. The piston rod utilizes SUS420J2 stainless steel for superior corrosion resistance, and the PT tapered port threading ensures a robust, leak-free pneumatic connection in demanding industrial environments.
Airtac SAI125 Standard Air Cylinder SAI125AX950S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX950S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAI125AX950S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAI125AX950S Is Used
Heavy Stamping Presses
Provides the high kinetic energy and 8590 N force needed to drive large metal forming and stamping dies over a long 950 mm travel distance.
Automotive Assembly Jigs
Moves substantial chassis components or engine blocks into position, utilizing the dual sensor grooves to confirm stroke endpoints precisely.
Pallet Transfer Indexing
Pushes heavy palletized goods between conveyor lanes, relying on the robust SUS420J2 rod to withstand repetitive lateral stresses.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX950S the Right Cylinder?
Generating 8590 N of push force at 0.7 MPa, this 125 mm bore is highly effective for moving heavy pallets or actuating large presses. If your application requires less force, stepping down to the 100 mm bore yields 5497 N at 0.7 MPa, whereas jumping to the 160 mm bore offers 14074 N for massive load requirements.
Because the 950 mm stroke creates a long, unsupported rod extension, side loads can cause severe bending stress on the rod bearing. Implement an external linear guide or select a guided cylinder to prevent premature wear. Furthermore, the adjustable air cushions only decelerate the piston near the stroke ends and will not hold a suspended load; if pressure drops, the load will drift. Use an external pilot-operated check valve or the SAIL locking variant for fail-safe position holding.
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 SAI125AX950S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N. The theoretical maximum force at 1.0 MPa is 1251 kgf.
Yes, the SAI125X950-S is dimensionally interchangeable per the ISO 15552 standard, meaning it shares identical mounting footprint and pin dimensions with other ISO 15552 profile cylinders. Always verify your specific mounting accessory and port thread requirements before swapping.
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