Airtac SAI40 Standard Air Cylinder SAI40AX125
The AirTAC SAI40 Standard Air Cylinder SAI40AX125 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 125mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAI40 Standard Air Cylinder SAI40AX125
The AirTAC SAI40X125 is a double-acting ISO 15552 profile cylinder engineered to deliver 628 N of push force and 528 N of pull force at 0.5 MPa. Its extruded aluminum barrel design eliminates exposed tie rods, providing a standardized mounting interface that serves as a direct replacement for other ISO 15552 actuators. The 125 mm stroke makes it well-suited for mid-length positioning tasks.
This specific configuration utilizes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It features PT tapered port threads and lacks a standard magnet, meaning position sensing via CMSE or DMSE switches is not supported without modification. For applications requiring heat resistance, the standard TPU seals can be swapped for Viton (code H).
Airtac SAI40 Standard Air Cylinder SAI40AX125 Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40AX125 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI40 Standard Air Cylinder SAI40AX125
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SAI40 Standard Air Cylinder SAI40AX125 Is Used
Component Clamping
Provides 628 N of clamping force at 0.5 MPa to secure medium-sized metal or plastic workpieces during secondary machining operations.
Package Diverting
Utilizes the 125 mm stroke to push lightweight to medium packages off a main conveyor belt into secondary packaging lanes.
Gate Actuation
Actuates safety gates or machine guarding doors where the SUS420J2 stainless rod offers resistance against minor environmental moisture.
Is the Airtac SAI40 Standard Air Cylinder SAI40AX125 the Right Cylinder?
Selecting this 40 mm bore is optimal when a 32 mm bore (402 N push at 0.5 MPa) lacks the necessary thrust, but a 50 mm bore (982 N push at 0.5 MPa) would be physically oversized. The 125 mm stroke offers a balanced extension range without requiring extreme space. Because this unit lacks a magnet, external limit switches must be used if position feedback is needed.
As a standard double-acting cylinder, the SAI40X125 relies on continuous air pressure to maintain its position. If air is exhausted or the valve is centered, the piston will drift, and the adjustable air cushions at both ends only decelerate the rod near stroke endpoints rather than holding the load. For applications requiring true position holding upon pressure loss, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. To replace an existing ISO 15552 unit, match the 40 mm bore, 125 mm stroke, G1/4 port size, and appropriate mounting accessory such as an FA flange or LB foot bracket.
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 SAI40 Standard Air Cylinder SAI40AX125 FAQ
At an operating pressure of 0.5 MPa, the SAI40X125 generates 628 N of push force and 528 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 879 N.
Yes, the SAI40X125 is dimensionally interchangeable per ISO 15552. You can use it as a direct replacement for other ISO 15552 profile cylinders by matching the 40 mm bore, 125 mm stroke, and G1/4 port size.
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