Airtac SAI125 Standard Air Cylinder SAI125X140S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X140S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X140S
The AirTAC SAI125X140-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit is built to handle substantial loads across its 140 mm stroke. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that simplifies mounting and sensor placement.
Equipped with a magnetic piston (-S), this model supports CMSE and DMSE position sensing via the integrated grooves on both sides of the barrel. It features a standard carbon steel piston rod and utilizes adjustable air cushions at both ends to decelerate heavy masses smoothly. For environments requiring elevated thermal resistance, the standard TPU seals can be swapped for Viton (H) or NBR (N) alternatives.
Airtac SAI125 Standard Air Cylinder SAI125X140S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X140S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAI125X140S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAI125X140S Is Used
Heavy Stamping
Provides the high thrust needed for pressing bearings or forming thick metal components in automated fabrication lines.
Pallet Diversion
Actuates heavy-duty diverter arms to route loaded pallets along high-capacity material handling conveyors.
Injection Molding Extraction
Delivers the robust pull force required to extract dense molded parts from industrial injection molding machines.
Is the Airtac SAI125 Standard Air Cylinder SAI125X140S the Right Cylinder?
Select this 125 mm bore when an 80 mm cylinder's 2513 N push force at 0.5 MPa is insufficient for your heavy lifting requirements. If the full 6136 N output is excessive, stepping down to a 100 mm bore yields 3927 N. Because this is a genuine ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 cylinders, matching standard mounting dimensions and PT-threaded G1/2 ports. Mounting accessories include LB foot blocks, FA flanges, and TC trunnion styles.
Note that a standard SAI cylinder relies on continuous air pressure to maintain its position. If your application drops pressure or centers the valve, the piston will drift. To hold a load securely without live pressure, specify the SAIL variant with an air-released lock, or the BSAI bidirectional clamp-lock cylinder.
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 SAI125X140S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If operated at 0.7 MPa, the push force increases to 8590 N.
Yes. The SAI125X140-S is dimensionally interchangeable per ISO 15552. You can drop it into existing foot, flange, or trunnion mounts designed for standard ISO 15552 profile cylinders.
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