Airtac SAI125 Standard Air Cylinder SAI125AX65S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX65S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX65S
The AirTAC SAI125X65-S is a double-acting ISO 15552 profile cylinder designed for heavy-duty automation. It delivers a push force of 6136 N at 0.5 MPa and a pull force of 5734 N. The 65 mm stroke is optimal for short, high-force clamping and pressing operations.
This specific configuration includes a SUS420J2 stainless steel rod (option A) for superior corrosion resistance in harsh environments. The -S suffix indicates an integrated magnet, allowing seamless operation with CMSE and DMSE sensor switches fitted into the dual-side barrel grooves. It features PT tapered port threads and adjustable air cushions at both ends.
Airtac SAI125 Standard Air Cylinder SAI125AX65S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX65S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAI125AX65S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAI125AX65S Is Used
Heavy-Duty Stamping
Provides the robust 6136 N thrust needed for short-stroke metal forming, riveting, and stamping tasks in fabrication lines.
Pallet Stopping
Acts as a heavy-duty stop block for large pallets on roller conveyors, securely halting heavy loads in material handling zones.
Press Fit Assembly
Delivers precise, high-force insertion for bearing and bushing seating in automated mechanical assembly machinery.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX65S the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore (10053 N) would be physically oversized. The 65 mm stroke avoids the side-load risks associated with longer extensions, making it highly robust for rigid pressing tasks. For applications requiring position holding without live air pressure, select the SAIL (air-released lock) or BSAI (clamp-lock) variants instead of relying on the standard cushion. This model is dimensionally interchangeable per ISO 15552, serving as a direct drop-in replacement for other standard profile cylinders.
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 SAI125AX65S 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.
No, the standard SAI cylinder does not hold its position when air pressure is lost or the valve is centered. The adjustable cushion only decelerates the piston near the stroke end. For load-holding, use the SAIL or BSAI variant.
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