Airtac SAI125 Standard Air Cylinder SAI125X210
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X210 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X210
The AirTAC SAI125X210 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125mm bore unit paired with a 210mm stroke handles substantial actuation tasks with ease. The extruded aluminum barrel eliminates tie-rods, providing a clean profile that drops directly into existing ISO 15552 mounting interfaces.
Built for demanding environments, the standard configuration features a durable carbon steel piston rod and PT tapered port threads. If your application involves temperature extremes, the seal architecture can be upgraded from standard TPU to Viton (H) for high-temperature resistance. For multi-position tasks, this base model can be complemented by the SAID double-rod variant.
Airtac SAI125 Standard Air Cylinder SAI125X210 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X210 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAI125X210
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAI125X210 Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate large mechanical stamping presses and heavy forming dies.
Injection Molding
Drives substantial core pulls and heavy ejector mechanisms on large injection molding machinery.
Pallet Handling
Lifts and positions heavy loaded pallets on conveyor lines where high kinetic output is necessary.
Is the Airtac SAI125 Standard Air Cylinder SAI125X210 the Right Cylinder?
Select this 125mm bore when a 100mm cylinder (offering 3927 N at 0.5 MPa) cannot provide enough thrust, but you want to avoid stepping up to the massive 160mm bore. The 210mm stroke provides ample travel for large clamping or lifting mechanisms. Because this model lacks a magnet, position sensing requires external limit switches rather than embedded CMSE or DMSE sensors.
At 210mm of travel, the unsupported rod length is moderate, but side-load management is still required to prevent premature rod-bearing wear. Utilize external guide rails to absorb lateral forces. Note that this standard cylinder relies on adjustable air cushions at both ends to decelerate the piston; it will not hold a load if air pressure drops. For dead-end holding without live pressure, specify the SAIL or BSAI lock variant.
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 SAI125X210 FAQ
At 0.5 MPa operating pressure, the SAI125X210 delivers a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes. The SAI125X210 is a genuine ISO 15552 profile cylinder, making its mounting dimensions fully interchangeable with other standard ISO 15552 cylinders of the same bore size.
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