Airtac SAI125 Standard Air Cylinder SAI125X120
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X120 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X120
The AirTAC SAI125X120 is a double-acting ISO 15552 profile cylinder offering a robust 6136N push force at 0.5 MPa. Its 120mm stroke handles heavy-duty positioning tasks with precision. The extruded aluminum barrel eliminates tie-rods, providing a clean profile that drops directly into standard ISO 15552 mounting interfaces.
This configuration features a standard carbon steel piston rod and PT tapered port threads. For environments requiring high-temperature resistance, the standard TPU seals can be swapped for Viton (H) variants. The barrel also includes dual-sided sensor grooves ready for CMSE or DMSE switches when a magnet is specified.
Airtac SAI125 Standard Air Cylinder SAI125X120 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X120 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAI125X120
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAI125X120 Is Used
Heavy Stamping
Provides the 6136N push force required to actuate large mechanical stamping presses and metalforming dies.
Automotive Assembly
Drives heavy-duty clamping fixtures and robotic weld gun manipulators holding chassis components.
Pallet Diverters
Actuates high-mass pallet routing gates and heavy product pushers on automated packaging lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125X120 the Right Cylinder?
Select this 125mm bore when 80mm falls short, as the 80mm bore only yields 2513N of push force at 0.5 MPa. The 6136N output here is ideal for moving substantial masses. Because the stroke is under 300mm, rod bearing bending is minimal, though external guides are still recommended for heavy offset loads.
Ensure your setup matches the 125mm bore, 120mm stroke, G1/2 port, and appropriate mounting accessories like FA flanges or TC trunnions. Note that this standard cylinder relies on live air pressure to hold position; if power drops, the load will drift. For fail-safe holding, explore the SAIL or BSAI variants instead.
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 SAI125X120 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
Yes, it is dimensionally interchangeable per ISO 15552 standards. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with identical mounting dimensions.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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