Airtac SAI125 Standard Air Cylinder SAI125AX210S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX210S 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 SAI125AX210S
The AirTAC SAI125X210-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore model is built to drive high-mass payloads. The 210 mm stroke provides ample extension for substantial linear transfer tasks.
Equipped with a standard magnet for CMSE and DMSE sensor switches, it enables precise end-of-stroke detection. This specific configuration features a SUS420J2 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads to ensure a high-integrity pneumatic seal.
Airtac SAI125 Standard Air Cylinder SAI125AX210S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX210S |
|---|---|
| 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 SAI125AX210S
| 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 SAI125AX210S Is Used
Heavy Stamping Press
Provides the high tonnage required to form and stamp thick-gauge metal components in automated fabrication cells.
Large Clamp Actuation
Secures oversized workpieces and heavy molds during CNC machining by applying constant, high-force clamping pressure.
Pallet Diversion
Drives robust pusher arms to redirect fully loaded pallets from main conveyor lines into packaging zones.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX210S the Right Cylinder?
Selecting this 125 mm bore unit makes sense when a 100 mm bore (offering 3927 N push at 0.5 MPa) cannot overcome the process friction, or when stepping down from the 160 mm class (10053 N) to save space and air consumption. Because the stroke is 210 mm, the unsupported rod length is significant; always use an external guide rail to prevent side-load bending of the rod bearing.
As a true ISO 15552 profile cylinder, it mounts interchangeably with standard foot, flange, and trunnion accessories. Note that standard double-acting cylinders drift if air pressure is lost; for fail-safe load holding, specify the SAIL or BSAI variant 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 SAI125AX210S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can achieve 8590 N push at 0.7 MPa.
No, the standard SAI profile cylinder relies on air pressure to maintain position and will drift downward if pressure is lost. For dead-load holding, use the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants.
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