Airtac SAI125 Standard Air Cylinder SAI125AX40
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX40
The AirTAC SAI125X40 is a double-acting ISO 15552 profile cylinder engineered for high-force tasks, delivering a push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa. Its 40 mm stroke provides rapid, short-travel actuation for heavy-duty clamping or holding tasks. The extruded aluminum barrel design omits tie rods, offering a clean exterior that is dimensionally interchangeable with other ISO 15552 cylinders.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance and mechanical durability. It utilizes PT tapered port threads and lacks a magnet (-S omitted), making it ideal for environments where magnetic sensing is not required. For high-temperature environments up to 70 C, the standard TPU seals can be swapped for Viton (H) alternatives.
Airtac SAI125 Standard Air Cylinder SAI125AX40 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAI125AX40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAI125AX40 Is Used
Heavy-Duty Stamping
Provides the robust 8590 N force at 0.7 MPa needed for short-stroke metal stamping and forming operations in fabrication lines.
Industrial Clamping
Ideal for securing heavy workpieces during machining, utilizing the 125 mm bore's high thrust in a compact 40 mm travel distance.
Press Mechanisms
Drives short-travel press assemblies where substantial impact force must be applied quickly and reliably.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX40 the Right Cylinder?
Choose this 125 mm bore when 100 mm (offering 3927 N at 0.5 MPa) cannot generate enough thrust for your heavy-load application. If you require less force and faster cycling, stepping down to the 100 mm bore is recommended. The 40 mm stroke is optimal for compact, high-force movements where a longer piston travel is unnecessary.
Because the standard SAI cylinder does not hold its position pneumatically when air pressure is removed, the piston will drift if a load is suspended. For applications requiring fail-safe load holding without live pressure, integrate the SAIL (air-released lock) variant or an external pilot-operated check valve. This model is a direct drop-in replacement per ISO 15552 mounting dimensions, utilizing a G1/2 port, PT threads, and standard FA/FB flange or TC trunnion accessories.
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 SAI125AX40 FAQ
The SAI125X40 generates a push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa, with a pull force of 5734 N at 0.5 MPa.
Yes, the SAI125X40 is dimensionally interchangeable per ISO 15552 standards. It uses a G1/2 port and standard mounting interfaces, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders.
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