Airtac SAI125 Standard Air Cylinder SAI125AX25
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX25 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX25
The AirTAC SAI125X25 is a double-acting ISO 15552 profile cylinder engineered for high-force, short-stroke operations. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it ideal for heavy pressing or clamping tasks within a compact footprint. This extruded aluminum barrel design omits tie-rods, offering a clean exterior that drops directly into standardized ISO 15552 mounting interfaces.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It utilizes PT tapered port threads and operates without a magnet. For applications requiring position holding without constant air pressure, the SAIL variant integrates an air-released lock to prevent drifting.
Airtac SAI125 Standard Air Cylinder SAI125AX25 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX25 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAI125AX25
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAI125AX25 Is Used
Heavy Duty Stamping
Executes high-force short-stroke stamping and marking operations, utilizing its 6136 N push force to deform or emboss metal components reliably.
Industrial Clamping
Secures heavy workpieces during machining or welding processes, providing rigid, high-tonnage holding power within a compact fixture envelope.
Press Fit Assembly
Drives bearings, pins, or bushings into housings, leveraging the 5734 N pull force and robust 125 mm bore to overcome high insertion resistance.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX25 the Right Cylinder?
Selecting this 125 mm bore cylinder is optimal when your application demands substantially more force than a 100 mm bore (which provides 3927 N push at 0.5 MPa) but requires minimal travel distance. The short 25 mm stroke excels in riveting, stamping, and heavy clamping operations where space is restricted but power is paramount.
Because the standard SAI125X25 lacks a position lock, it cannot hold a load if air pressure is lost or the valve is centered; the piston will drift under load. If static holding is required for safety, consider the BSAI bidirectional clamp-lock variant or an external pilot-operated check valve. Replacement mounting requires matching the exact 125 mm bore, 25 mm stroke, G1/2 port, and appropriate FA flange or LB foot 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 SAI125AX25 FAQ
At 0.5 MPa operating pressure, the SAI125X25 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, the SAI125X25 is dimensionally interchangeable per ISO 15552 standards. It shares standard mounting dimensions and G1/2 ports with other ISO 15552 profile cylinders, allowing for a direct drop-in replacement.
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