Airtac SAI125 Standard Air Cylinder SAI125AX240S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX240S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX240S
The AirTAC SAI125X240-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force. The 240 mm stroke is a non-standard, made-to-order dimension tailored for specific intermediate travel requirements.
This configuration includes a magnet (-S) for use with CMSE and DMSE sensor switches, utilizing the dual sensor grooves on the extruded aluminum barrel. It is built with an SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered port threads.
Airtac SAI125 Standard Air Cylinder SAI125AX240S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX240S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAI125AX240S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAI125AX240S Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate heavy-duty stamping and forming presses.
Pallet Diverting
Handles large conveyor payloads with a 240 mm stroke to shift heavy pallets across material handling lines.
Automated Clamping
Secures large fabricated weldments during robotic welding cells using high-force double-actuation.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX240S the Right Cylinder?
Selecting this 125 mm bore is ideal when 80 mm (2513 N push at 0.5 MPa) lacks power but the 160 mm bore (10053 N) is physically too large. Because the 240 mm stroke is non-standard, expect a made-to-order lead time. For applications requiring true position holding or drop prevention upon air loss, the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants are required instead of relying on the standard adjustable air cushions.
When specifying a replacement, match the 125 mm bore, 240 mm stroke, PT G1/2 port, and mounting accessory (such as TC trunnion or FA flange). Ensure the -S magnet option is selected if position feedback is needed.
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 SAI125AX240S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It reaches 8590 N push at 0.7 MPa.
Yes, it is dimensionally interchangeable per ISO 15552. You can drop it in to replace other ISO 15552 profile cylinders with a 125 mm bore, matching the G1/2 port and mounting dimensions.
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