Airtac SAI125 Standard Air Cylinder SAI125X65
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X65 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 SAI125X65
The AirTAC SAI125X65 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 65mm stroke. It generates a robust 6136N of push force at 0.5MPa, making it well-suited for heavy-duty pressing and clamping tasks that require a short, powerful stroke. The extruded aluminum barrel design omits tie-rods, providing a clean exterior.
This specific configuration includes a standard carbon steel piston rod and PT tapered port threads. While the stroke length of 65mm is a non-standard dimension outside the typical manufacturing increments, it is available as a made-to-order option. The barrel features dual-sided sensor grooves for mounting CMSE or DMSE switches, though adding a magnet (-S) would be required for that functionality.
Airtac SAI125 Standard Air Cylinder SAI125X65 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X65 |
|---|---|
| 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 SAI125X65
| 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 SAI125X65 Is Used
Heavy-Duty Stamping
Provides the high 6136N force needed for short-stroke metal forming and stamping operations.
Pallet Diverting
Drives robust diverters on heavy-load roller conveyors where a compact 65mm stroke is sufficient.
Injection Mold Clamping
Applies steady holding force on large molds, utilizing the 125mm bore's substantial thrust.
Is the Airtac SAI125 Standard Air Cylinder SAI125X65 the Right Cylinder?
Selecting this 125mm bore provides 6136N push and 5734N pull force at 0.5MPa. If your application requires less force, stepping down to an 80mm bore yields 2513N, preventing excessive energy consumption. For short-stroke heavy pressing, the 65mm stroke minimizes cycle time while maintaining maximum thrust.
Because the standard SAI is double-acting, it relies on continuous air pressure to maintain position. If air is lost or the valve is centered, the load will drift. For applications requiring position holding without live pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants. As an ISO 15552 cylinder, it serves as a drop-in replacement for any standard 125mm bore, 65mm stroke profile cylinder with a G1/2 port and compatible mounting accessories like FA flanges.
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 SAI125X65 FAQ
At 0.5MPa, the push force is 6136N and the pull force is 5734N. At 0.7MPa, the push force increases to 8590N.
Yes, the SAI125X65 is dimensionally interchangeable per ISO 15552. It matches standard 125mm bore mounting interfaces and G1/2 ports, serving as a direct drop-in replacement.
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